An assessment of the therapeutic and health benefits of commercialized herbal teas available in various supermarkets, and drugstores, and advertised by entrepreneurs through radios in Iligan City was done. Sixty-five (65) herbal teas were found commercially sold and were found to contain ninety-eight (98) plant species as ingredients prepared individually or in groups. These teas have been claimed to be therapeutic. Camellia sinensis, Rosa rubiginosa, and Jasminum sambac Linn., were the most used plants in herbal teas, and argued to contain micronutrients like polyphenols. These are naturally active substances responsible for biological actions that treat human ailments. Diabetes, heart disease, and mental health were the most frequently listed health problems addressed by the tea products. Leaves were the most widely used plant part in the teas. Flavonoids, phenolic compounds, and alkaloids are the predominant bioactive constituents that were reported in the plants. Assessment of the individual properties of each of the plant species shows specific therapeutic functions, associated with the component bioactive compounds. While commercialized herbal teas sold have no approved therapeutic claims these were very popular with many users due to convincing marketing, especially through social media and radio. It was argued however that more investigations into the bioactive components found not only in each plant utilized as an ingredient but also when mixed to determine interactions of component compounds from each plant species and any potential toxicity or adverse reactions to users.
Key findings:
Key findings include: the assessment of 65 commercially sold herbal teas in Iligan City containing 98 plant species, with Camellia sinensis, Rosa rubiginosa, and Jasminum sambac Linn. being the most used plants; teas claimed to address health issues like diabetes, heart disease, and mental health; emphasis on bioactive compounds like flavonoids and phenolic compounds for therapeutic effects.
What is known and what is new?
The known aspect is the therapeutic and health benefits of herbal teas. The new contribution is the assessment of commercialized herbal teas in Iligan City, identifying 65 teas with 98 plant species, and highlighting the most used plants, their bioactive compounds, and potential therapeutic functions, emphasizing the need for further research on interactions and potential toxicity.
What is the implication, and what should change now?
The implication is that while commercialized herbal teas are popular, more research is needed on the interactions and potential toxicity of their bioactive compounds. Changes needed include stricter regulations on therapeutic claims, and further investigations into the safety and efficacy of herbal tea ingredients, both individually and in combination, to ensure consumer safety.
Plants are known to have phytonutrients, which are bioactive compounds considered beneficial to human health. For many decades it remained the basis for the development of modern drugs to treat numerous forms of diseases all over the world [1]. As an efficient natural remedy for any ailment, commercialized plant-based products were developed such as tea, and became widespread when commercialized in the market.
Tea, caffeine-free, is currently the most popular beverage worldwide after water. They are known to be reliable, dependable, simple to use, affordable, and believed to be safer than synthetic drugs. These factors helped to expand the popularity of these teas and make them a crucial nutritional component. Teas are made from different plant parts, such as leaves, herbs, fruits, blooms, roots, etc. They are known for their abundant number of antioxidants such as polyphenols, polysaccharides, and amino acids, and have become popular as a healthy beverage for lowering obesity, cancer, liver, and cardiovascular problems [2].
However, a previous study described a patient who experienced acute liver failure after drinking an herbal detox tea that was marketed as being hepatoprotective. Six components of the aforementioned tea were linked to hepatotoxicity in one or more published studies [3]. Although tea polyphenols may have health benefits for people, they can cause fat to accumulate by encouraging fat cell growth and extending fat cell sizes, which results in nutritional obesity [4]. In addition, excessive use of the laxative senna in pharmaceutical preparations causes finger clubbing. This was first described by Silk and colleagues in 1975, and the same case was again described by Rashiq and others in 1996 [5-6]. For these reasons, the level of heavy metal contamination in herbal products has raised serious concerns about their safety and quality. Thus, the study's objectives were to assess the commercialized herbal teas available in various stores, drugstores, and those advertised on radios in Iligan City, to record all plant species as ingredients present including their therapeutic claims. Data mining of reported ethnopharmacological and biochemical components and functions in the plants was also gathered to determine the possible safety and efficacy of the specified herbal teas.
2.1 Tea Samples and Data Collection
A total of 65 tea samples (local and imported tea products) were collected in various stores, and drugstores in Iligan City were documented. Plant species with their scientific names as an ingredient, plant parts used, and therapeutic claims of each tea product were noted. The plant’s family and scientific names were also recorded.
2.2 Data Mining
A systematic literature review was conducted to identify and analyze research articles and publications from PubMed, Google Scholar, ScienceDirect, and ResearchGate databases pertinent to the medicinal plants used as an ingredient in herbal teas. In addition, a thorough literature review was conducted to identify the bioactive compounds of each medicinal plant and to assess their corresponding biological activities.
Due to the public's increased interest in using herbal medicines, herbal teas are becoming more and more popular among consumers [12]. Of the total 64 herbal teas collected, 98 medicinal plant species were observed to be constituents either individually or mixed to treat different ailments/ diseases (Table I). These plant species belong to 47 different families namely: Actinidiaceae, Anacardiaceae, Annonaceae, Apiaceae, Apocynaceae, Arecaceae, Asteraceae, Bignoniaceae, Boraginaceae, Bromeliaceae, Cactaceae, Caprifoliaceae, Caricaceae Caryophyllaceae, Costaceae, Clusiaceae, Cucurbitaceae Ericaceae, Euphorbiaceae, Fabaceae, Ginkgoaceae, Grossulariaceae, Lamiaceae, Lauraceae, Lythraceae, Malvaceae, Moringaceae, Myrtaceae, Nelumbonaceae, Oleaceae, Paeoniaceae, Pandanaceae, Passifloraceae, Phyllantaceae, Poaceae, Polygonaceae, Punicaceae, Rosaceae, Rubiaceae, Rutaceae, Sapindaceae, Solanaceae, Theaceae, Urticaceae, Vitaceae, Viticaceae and Zingiberaceae.
Table 1. Commercialized Herbal Tea Plants Sold in Iligan City
No. | Product’s Name | Medicinal Plants | Plant Part Used | Therapeutic claims |
1 | TWININGS OF LONDON (GREEN TEA Earl Grey)
| Camellia sinensis Monarda didyma L. | leaves
| Support heart health and prevent serious cardiovascular diseases such as heart attacks and high blood pressure
|
2 | TWININGS OF LONDON (GREEN TEA Jasmine)
| Camellia sinensis Jasminum sambac Linn. | leaves, flowers
| Lower your risk of heart disease, mental decline, and certain cancers
|
3 | TWININGS OF LONDON (GREEN TEA & Lemon)
| Camellia sinensis Citrus limon | leaves, fruit
| Reduces your risk of stroke or heart attack
|
4 | TWININGS OF LONDON (Pure Camomile)
| Matricaria recutita | flower
| Digestive upset, Wound healing, Generalized anxiety disorder (GAD), depression
|
5 | ABS HERBS (Sambong Tea)
| Blumea balsamifera | leaves
| Treat wounds and cuts, rheumatism, anti-diarrhea, anti-spams, colds and coughs
|
6 | RITA RITZ (Lolo Jose's Banaba Tea)
| Lagerstroemia speciosa | leaves
| Diabetes, kidney failure, obesity, constipation, kidney inflammation, and urinary dysfunctions
|
7 | RITA RITZ (Guyabano Fruit Tea)
| Annona muricata
| fruit and leaves
| Cure for diabetes because it helps improve the body’s tolerance for glucose and hyperlipidemia
|
8 | RITA RITZ (Lagundi Herbal Tea)
| Vitex negundo
| leaves
| Asthma, coughs, and body pain
|
9 | THE GOOD HARVEST Dried Fruit and Tea Infusions (Crimson glory, Lemon, Jasmine)
| Vitis coignetiae Citrus limon Jasminum sambac Linn. | fruit and flowers
| Relaxation
|
10 | THE GOOD HARVEST Dried Fruit and Tea Infusions (Hibiscus, Rose, White Dragon Fruit)
| Hibiscus Rosa Selenicereus undatus
| fruit and flowers
| Relaxation
|
11 | THE GOOD HARVEST Dried Fruit and Tea Infusions (Papaya, Grapefruit, Jasmine)
| Carica papaya Vitis vinifera Jasminum sambac Linn | fruit and flowers
| Relaxation
|
12 | THE GOOD HARVEST Dried Fruit and Tea Infusions (Pineapple, Date, Rose)
| Ananas comosus Phoenix dactylifera Rosa
| fruit and flowers
| Relaxation
|
13 | THE GOOD HARVEST Dried Fruit and Tea Infusions (Pear, Melon, Black Goji)
| Pyrus communis Cucumis melo Lycium ruthenicum | fruit
| Relaxation
|
14 | THE GOOD HARVEST Dried Fruit and Tea Infusions (orange peel, red dragon fruit, pear slice)
| Citrus sinensis Selenicereus undatus Pyrus communis | fruit
| Relaxation
|
15 | THE GOOD HARVEST Dried Fruit and Tea Infusions (Jasmine, White Dragon fruit, Kiwi)
| Jasminum sambac Linn Hylocereus undatus Actinidia deliciosa | flower and fruit
| Relaxation
|
16 | THE GOOD HARVEST Flower FruitT Mix Tea (Roselle, Sugared Hawthorn, Apple, Melon, Pineapple, Lemon and Cherry)
| Hibiscus sabdariffa Crataegus monogyna Malus domestica Cucumis melo Ananas comosus Citrus limon Prunus avium
| flower and fruit
| High in vitamin C, rich in antioxidants
|
17 | THE GOOD HARVEST Blue Butterfly Pea Tea
| Clitoria ternatea
| flower
| |
18 | THE GOOD HARVEST Lavender Flower Tea
| Lavandula angustifolia
| flower
| Improve mood disorders, help with anxiety, depression, and fatigues, boost sleep, soothe menstrual cramping
|
19 | THE GOOD HARVEST Genmaicha Tea
| Oryza sativa Camellia sinensis
| leaves and fruit
| Good for the heart health
|
20 | THE GOOD HARVEST Marigold Calendula Flower Tea
| Calendula officinalis | flower
| Antioxidants, have antifungal and antimicrobial properties, support oral health, regulate menstrual cycle, boost heart health
|
21 | THE GOOD HARVEST Longan Tea
| Dimocarpus longan
| fruit
| Anti-inflammatory, helps strengthen the liver, spleen, and kidneys, relaxing and calming to help ease anxiety
|
22 | THE GOOD HARVEST Kumquat Fruit Tea
| Citrus japonica
| fruit
| Aids in digestion helps balance blood sugar, rich in antioxidants, helps rid of free radicals that cause stress and aging to the body
|
23 | RITA RITZ Pito-Pito Dried Herbal tea
| Lagerstroemia speciosa Psidium guajava Mangifera indica Pandanus amaryllifolius Centella asiatica Pimpinella anisum Premna odorata
| Leaves, seeds | Lowering blood sugar, healthy gums and aids the symptoms of loose bowels, antibacterial, pain reliever, healing of wounds, relax the muscles, produces gastric protection, aids the digestive system, cure tuberculosis
|
24 | HERBAL SLIMMING TEA (Peach Apricot) with Senna leaves
| Prunus persica Prunus armeniaca Cassia angustifolia
| Fruit, leaves
| Support cleansing and thermogenic activity within the body helping to promote the elimination and storage of excess calories
|
25 | HERBAL SLIMMING TEA (Cranraspberry) with Senna leaves
| Vaccinium macrocarpon Rubus idaeus Cassia angustifolia
| Fruit, leaves
| Support cleansing and thermogenic activity within the body helping to promote the elimination and storage of excess calories
|
26 | MY MARVEL Taheebo Herbal Tea
| Tabebuia avellanedae
| inner bark
| Promote strength and vitality, help boost immunity
|
27 | Bignay Tea
| Antidesma bunius
| fruit
| Antioxidant, promotes colon health and weight loss, UTI, liver health, regulation of blood pressure, eye health, skin rejuvenation, prevents anemia, helps flushing out uric acid, urea, toxin, and prevent stone formation in the kidney
|
28 | Red Alingatong Roots Herbal Tea
| Urtica Dioica
| roots
| Kidney stone, uric acid, kidney disorders, lowers creatinine, UTI, gallstone, prostate enlargement, high blood pressure, rheumatoid arthritis, diabetes, gout, insomnia, prostate enlargement
|
29 | ALOKOZAY Rooibos Tea
| Aspalathus linearis
| leaves
| Antioxidants
|
30 | ALOKOZAY Thyme Tea
| Thymus vulgaris
| leaves
| Increase memory, prepare the body for sleep and even bring luck
|
31 | ALOKOZAY Pomegranate Tea
| Punica granatum
| fruit
| Promote heart health, reduce inflammation, slow down osteoarthritis and lessen joint pains
|
32 | ALOKOZAY Fennel Tea
| Foeniculum vulgare
| flower
| Improve digestive health
|
33 | ALOKOZAY Black Currant Tea
| Ribes nigrum
| fruit
| Rich in antioxidants, iron and potassium, regulating blood pressure, increasing fat oxidation, and promoting skin health
|
34 | MVPM Insulin Plant Herbal tea
| Chamaecostus cuspidatus
| leaves
| Prevents diabetes, regulates blood sugar level, promotes healthy liver, antioxidant, immunity booster, anti-cancer, regulates blood pressure
|
35 | Pure Paragis Tea
| Eleusine indica
| leaves
| PCOS, myoma, cyst, UTI, irregular menstruation, sperm count, diabetes, high blood, kidney, arthritis, parasites
|
36 | Sapang Red Tea
| Caesalpinia sappan L.
| wood
| Tuberculosis, binat, anemia, liver cancer, hypertension/high blood, hepatitis, diarrhea, diabetes, tumor, irregular menstruation, breast cancer, stomach cancer, ovarian cancer and etc.
|
37 | Damong Maria Tea
| Artemisia vulgaris Linn
| leaves
| Good for irregular menstruation, adenomyosis, women with endometriosis, PCOS help dissolves cyst, clear UTI and bad vaginal smell or discharge
|
38 | Pure Serpentina Tea
| Rauvolfia serpentina (L.) | leaves
| Cancer fighter, diabetes, antibacterial,m antiviral, analgesic, anti-inflammatory, high blood pressure, expectorant, immunity enhancer
|
39 | Pure Ginger Salabat Tea
| Zingiber officinale | roots
| Aids in digestion, fights respiratory problems, relieves stress, reduces acne, increases sperm count
|
40 | TWININGS OF LONDON (Passionfruit, Mango and Orange) TEA
| Passiflora edulis Mangifera indica Citrus sinensis
| fruit
| Not specified |
41 | TWININGS OF LONDON FOUR RED FRUITS TEA (Strawberry, Raspberry, Cherry and Redcurrants)
| Fragaria ananassa Rubus idaeus Prunus avium Ribes rubrum
| fruit
| Not specified |
42 | CRAFTEA NUTTY (Dried Stevia)
| Stevia rebaudiana
| leaves
| Aids in managing diabetes and weight control, relieves upset stomach, indigestion and heartburn, helps reduce formation of bacteria in the mouth preventing cavities and gingivitis, boost bone health and reduce the risk of osteoporosis
|
43
| CRAFTEA NUTTY Blueberry Balm (Butterfly pea, Rosehip, Blueberry and Lemon)
| Clitoria ternatea Rosa Vaccinium meridionale Citrus limon
| flower, fruit
| Enhances mood, boosts collagen production, lowers blood pressure, and flushes out water weight
|
44 | CRAFTEA NUTTY Mighty Green Warrior (Green Tea, Wolfberry and Orange)
| Camellia sinensis Lycium barbarum Citrus sinensis
| Leaves, fruit
| Colds and flu slayer, improves digestion, weight loss and fats flush-out, heart disease prevention
|
45 | CRAFTEA NUTTY Heavenly Green Tea (Green Tea, Bamboo, Mint)
| Camellia sinensis Bambusoideae Mentha
| leaves
| Mental clarity, detoxifies blood, promotes heart and gut health, fights inflammation and infections
|
46 | CRAFTEA NUTTY A Spiced Life (Assam, Cinnamon, Cardamom, Ginger)
| Camellia sinensis Cinnamomum verum Elettaria cardamomum Zingiber officinale | leaves
| Boosts alertness, sustained energy non-crashing feeling, improves digestion and metabolism, boosts immunity
|
47 | CRAFTEA NUTTY Brainy and Savvy (Jasmine green tea, Ginkgo Biloba, Rosemary)
| Jasminum sambac Linn Camellia sinensis Ginkgo biloba Salvia rosmarinus | leaves
| Improves memory and focus, stimulates creative thinking, elevates mood and pacifies anxiety, headache and migraine relief
|
48 | TWININGS OF LONDON Defence (citrus, ginger with green tea, echinacea)
| Citrus Zingiber officinale Camellia sinensis Echinacea
| leaves, root and fruit
| Supports the normal function of the immune system
|
49 | TWININGS OF LONDON Sleep Blue (Blood Orange flavored herbal infusion with orange blossom, chamomile, passionflower, lavender, and valerian)
| Citrus sinensis Matricaria chamomilla Passiflora incarnata Lavandula Valeriana officinalis
| root
| Contributes to normal sleep
|
50 | FLOWER TEA (Peach Flower)
| Prunus persica
| flower
| Promotes weight loss, serves as a mild laxative that removes excess fats and toxins, reduces skin pigmentation, and boosts skin hydration
|
51 | FLOWER TEA (Peony Flower)
| Paeonia
| flower
| Improves blood flow, treats pain, muscle cramps, and inflammation, treats PCOS, and promotes healthy and balanced estrogen
|
52 | FLOWER TEA (Carnation Flower)
| Dianthus caryophyllus
| flower
| Treats pimples and acne, promotes clearer skin, promotes healthy digestion, anti-aging
|
53 | LIPTON (Peppermint and Spearmint Tea)
| Camellia sinensis Mentha piperita Mentha spicata
| leaves | Can help support a healthy heart
|
54 | AHMAD TEA (Lemon, Mate, Matcha green tea)
| Citrus limon Ilex paraguariensis Camellia sinensis
| Leaves, fruit | Weight loss
|
55 | AHMAD TEA (Mango and Lychee)
| Mangifera indica Litchi chinensis
| fruit | Not specified |
56 | Oregano Powder Tea
| Origanum vulgare
| leaves | For sore throat, cough, nausea, digestive problems and irritable bowel syndrome
|
57 | NATURE'S APOTHECARY Tulsi Traditional Herbal Tea
| Ocimum tenuiflorum
| leaves | Nourishes the skin, rich in vitamin C, promotes restful sleep, reduces high blood pressure, promotes relaxation, decongests sinuses, relieves headaches
|
58 | NATURE'S APOTHECARY Namaste Signature Tea Blend (dried honeysuckle, white grass root, gardenia, tangerine peel, licorice, white tea, monk fruit)
| Lonicera periclymenum Leersia virginica Gardenia jasminoides Citrus reticulata Glycyrrhiza glabra Camellia sinensis Siraitia grosvenorii
| Leaves, roots, peel, fruit | Supports the respiratory system, supports liver health, supports the digestive system, helps reduce inflammation, helps lower cholesterol levels, rich in antioxidants
|
59 | AHMAD TEA BEAUTY (nettle leaves, lemon verbena leaves, lemon balm, lemongrass, chicory root, linden flowers, carob, rose, aloe vera, peach)
| Urtica dioica Aloysia citrodora Citrus limon Cymbopogon citratus Cichorium intybus Tilia Ceratonia siliqua Rosa rubiginosa Aloe barbadensis miller Prunus persica
| Leaves, fruit, root, flowers | Proper sleep
|
60 | NATURE'S APOTHECARY Sampa-sampalukan Traditional Herbal Tea
| Phyllanthus niruri Linn.
| leaves | Protects liver from toxins, dissolution of kidney stones, cholesterol-lowering effects, lowers blood sugar levels, prevents gout attacks
|
61 | NATURE'S APOTHECARY Forget-me-Nots Traditional Herbal Tea | Euphorbia hirta
| leaves | Natural bronchodilator, anti-inflammatory, anthelmintic, treat digestive problems, analgesic
|
62 | NATURE'S APOTHECARY Salabat Plus Traditional Herbal Tea (Ginger, Turmeric, Mangosteen, Moringa, Guyabano, Oregano, Avocado, Lemongrass, Ampalaya and Peppermint)
| Zingiber officinale Curcuma longa Garcinia mangostana Moringa oleifera Annona muricata Origanum vulgare Persea americana Cymbopogon citratus Momordica charantia Mentha piperita
| Leaves, fruits | Not specified |
63 | NATURE'S APOTHECARY Forget-me-Nots Traditional Herbal Tea
| Myosotis scorpioides
| flower | Nourishes the skin, rich in Vitamin C, promotes restful sleep, reduces high blood pressure, promotes relaxation
|
64 | PURE TEA 14 Day Skinny Tea (senna leaf, lotus leaf, chamomile, dark pu'erh leaf, sencha green tea, lemongrass, Garcinia Cambogia extract, rhubarb root, fennel, marshmallow leaf, holy thistle leaf, and malva leaf)
| Senna Nelumbo nucifera Matricaria chamomilla Camellia sinensis Cymbopogon citratus Garcinia cambogia Foeniculum vulgare Althaea officinalis Cnicus benedictus Malva | Leaves, root | To support weight loss with traditional organic herbs that aid in detoxification and eliminate toxins released from fat cells when you lose weight. Helps burn fat and increase metabolism resulting in healthy weight loss.
|
Species within the Lamiaceae, Rosaceae, and Asteraceae plant families have been scientifically validated for their positive impact on human health (Table 2). Notably, the Lamiaceae family, commonly known as the mint family, boosts a considerable number of medicinal species. Ethnobotanical to pharmacological studies reveal that some of these species have a longstanding history in folk medicine, with approximately 80% of the family's species being utilized for medicinal purposes. Plants within the Lamiaceae family are recognized for their abundance of polyphenolic components and terpenoids, contributing to their effectiveness in addressing digestive system issues, particularly flatulence and dyspepsia. Additionally, they are employed as constituents and treatments for infections [7]. The Rosaceae family, exemplified as a group of flowering plants, represents a promising reservoir of natural antioxidants. The utilization of total phenolics and flavonoids derived from these plants has been explored for the treatment of various diseases and ailments [8]. Similarly, the Asteraceae family, one of the largest groups of flowering plants, has been part of our diet and used for healing for a long time. The beneficial effects of these plants come from their natural compounds, like alkaloids, which are commonly used in medicine. Studies show that this plant family is rich in chlorogenic acids, which act as antioxidants and help prevent diseases [9].
C. sinensis, C. limon, and J. sambac Linn are highly favored medicinal plants commonly used as ingredients in teas due to their several health benefits. In particular, Twinings of London herbal teas, featuring C. sinensis, claim to support heart health, lower the risk of certain cancers, and help prevent mental decline. This valuable plant which is known as the “tea plant” was studied in numerous laboratory research indicating that the bioactive compounds present in this plant have various physiological benefits against cardiovascular diseases, cancer progression, inflammatory response, and lower the risk of mental decline. It was reported that the anti-cancer effects of C. sinensis were due to its polyphenols (except ()-epicatechin) that exhibit the property of cell growth inhibition, and flavonoids that may be involved in the induction of apoptosis [10-11]. Reports suggested that consuming this tea decreased the 50% risk of gastric cancer in the Chinese population, and similarly, black tea exhibited strong protective actions against gastric cancer in the Indian population [12-13]. Another study confirmed that the consumption of green tea decreased the risk of colorectal cancer which was done by catechins that inhibit the activity of cancer-inducing nitrosamine compounds and heterocyclic amines [14]. The application of catechin nanohybrids in WM266 human melanoma significantly increased the rate of apoptosis of tumor cells [15]. Furthermore, several studies have been conducted on the tea polyphenols, flavan-3-ol, which were associated with antioxidant functions [16]. Also, studies suggest that green tea is the richest source of epigallocatechin-3-gallate (EGCG) which has reactive oxygen species (ROS) scavenging properties, and theaflavins which are more effective than epigallocatechin-3-gallate (EGCG) which has a strong free radical activity. These bioactive compounds present in teas might be the basis for the herbal teas' therapeutic claims that they can lower the risk of heart disease. Moreover, tea consists of a particular amino acid, L-theanine which has a significant role in the central nervous system that alters the synthesis of dopamine and serotonin in the brain, which helps in improving cognitive functions and reduces stress, mood, anxiety, and depression [17-18].
Table 2. Plants Used in Herbal Teas
Family/Scientific Name | Biological Activities | Bioactive Compounds | Reference/s |
Actinidiaceae | |||
Actinidia deliciosa | Antimicrobial activity | syringic, chrysin and quercetin, catechin, quercetin, and epigallocatechin
| [19-20] |
Antioxidant activity | |||
Anacardiaceae | |||
Mangifera indica Linn | Anticancer activity, Antioxidant activity | quercetin 3-o-galactoside, polyphenols, carotenoids and anthocyanins
| [21-22] |
Gastroprotective Effect | mangiferin | [23] | |
Anonaceae | |||
Annona muricata | Antidepressive | anonaine, asimilobine, nor nuciferine | [24-25] |
Antioxidant | vitamin c, vitamin e, superoxide dismutase and catalase | [26] | |
Antimicrobial activity | flavonoids, tannins, alkaloids, saponins and cardiac glycosides | [27] | |
Anticarcinogenic | acetogenins (ace) | [28] | |
Antimalarial activity | isoboldine | [29] | |
Apiaceae | |||
Centella asiatica | Anticancer activity, Anti-inflammatory activity/ Wound Healing, Antidepressant activity, Antioxidant property, Neuroprotective activity | asiatic acid | [30-34] |
Foeniculum vulgare | Anti-bacterial activity | trans-anethole, fenchone, and limonene | [35] |
Anti-fungal activity | |||
Anti-anxiety activity | quercetin-3β-d-glucoside, rutin, hyperoside, quercetin, miquelianin, trifolin, isorhamnetin and kaempferol | [36] | |
Pimpinella anisum | Muscle Relaxant | pyridoxine, niacin, riboflavin, and thiamin | [37] |
Anticonvulsant and antimicrobial | phenylpropanoids, monoterpenes (hydrocarbons and phenolics), and trans-anethole, cis-anethole, estragole, linalool, α-terpineol, and methyl eugenol | [38] | |
Wound healing and Anti-Inflammatory | galactose, β-d-glucose, α-d-mannose, β-d-galactose, d-fructose, α-d-glucose, α-l-galactose and arabinose | [39] | |
Antioxidant Activity | palmitic, petroselinic, trans-anethole, naringin, gallic, rosmarinic, allergic and syringic acids | [40] | |
Antidiabetic,hypolipidemic, | apigenin and luteolin | [41] | |
Apocynaceae | |||
Rauvolfia serpentina (L.) | Antibacterial, antioxidant, and antineoplastic | ajmalicine, ajmaline, yohimbine, and reserpine, kaempferol, vincamine | [42-44] |
Arecaceae | |||
Phoenix dactylifera | Antioxidant activity | gallic acid, chlorogenic acid, vanillic acid, caffeic acid, syringic acid, tyrosol, ferulic acid, o-coumaric acid, vanillin, catechin and rutin | [45] |
Antiviral activity | protein and some derived polyphenolic compounds such as polysaccharides, lignans and bioflavonoids | [46] | |
Antifungal activity | flavonoids, tannins, alkaloids and coumarins | [47] | |
Nephroprotective activity | melatonin, vitamin e, and ascorbic acid | [48] | |
Asteraceae | |||
Artemisia vulgaris Linn | Antifertility activity | steroids, flavonoids and saponins | [49] |
Antioxidant activity | Not mentioned | [50] | |
Blumea balsamifera | Antitumor | dihydroflavonol bb-1
| [51] |
Antimicrobial | flavonoids and sesquiterpenoids | [52] | |
Anti-tyrosinase and anti-cancer | luteolin-7-methyl ether | [53] | |
Antifungal | ichthyothereol acetate and cryptomeridiol | [54] | |
Antioxidant activity | quercetin, rhamnetin, luteolin, luteolin-7-methyl ether , l-ascorbic acid, blumeatin, butylated hydroxyanisole, 5,7,3′,5′-tetrahydroxyflavone, tamarixetin, butylated hydroxytoluene, α-tocopherol, dihydroquercetin-4′-methyl ether , dihydroquercetin-7,4′-diethyl ether | [55] | |
Calendula officinalis | Anti-bacterial and antifungal | t-muurolol and palustron | [56] |
Cichorium intybus | Anti-inflammatory effect | carrageenan | [57] |
Wound healing effect | β-sitosterol | [58] | |
Gastroprotective | alkaloids, phenols, flavonoids, saponins, carbohydrates and glycosides | [59] | |
Anticancer effect | flavonoids | [60] | |
Hepatocyte Protective and anti- hepatitis-B | cichoric acid | [61] | |
Cnicus benedictus | Antioxidant activity, anti-inflammatory | vanillic, silibinin b, ferulic acid and rutin | [62] |
Antibacterial activity | alkaloids, flavonoids, phenols, tannins and terpenes. | [63] | |
Echinacea | Antioxidant | caftaric acid, chlorogenic acid, caffeic acid, cynarin, echinacoside and cichoric acid | [64] |
Matricaria recutita | Antimicrobial activity | α-bisabolol oxide, followed by camphene, sabinene, limonene,1,8-cineole, camphor, and α-pinene | [65] |
Antifungal activities | chamazulene, isopropyl hexadecanoate, trans-trans-farnesol and e-β-farnesol | [66] | |
Antioxidant activity, antitumor, chemopreventive | phenols and flavonoids | [67] | |
Anti-inflammatory | apigenin | [68] | |
Antigenotoxic actions | essential oils | [69] | |
Stevia rebaudiana | Antioxidant | phenols and flavonoids | [70] |
Bignoniaceae | |||
Tabebuia avellanedae | Anti-inflammatory | arachidonic acid | [71] |
Boraginaceae | |||
Myosotis arvensis | antibacterial | fatty acids, alkaloids, saponins, anthocyanins and flavonoids | [72] |
Bromeliaceae | |||
Ananas comosus | Hepatoprotective activity | tannins, triterpene, steroids and flavonoids | [73] |
anti-inflammatory | campesterol and ethyl iso allocholate | [74] | |
Antimalarial | linoleic acid and palmitic acid | [75] | |
Cactaceae | |||
Hylocereus undatus | Antioxidant activity | rhamnose, galactose, galacturonic acid, xylose, lignin, salicylic acid and protocatechuic acid | [76] |
Selenicereus undatus | Antidiabetic | alkaloid and flavonoid | [77] |
Caprifoliaceae | |||
Lonicera | Antioxidant activity | hexadecanoic acid, trans-farnesol, benzyl benzoate, 2-heptadecanone, linalool, benzaldehyde, anthracene, -terpineol, -muurolene and octadecane | [78] |
Valeriana officinalis | Antioxidant activity | phenolic (gallic acid) | [79] |
Antiepileptic, anticonvulsant effect | isovalerate | [80] | |
Sleep problem | valepotriates | [81] | |
Anxiolytic effects and analgesic | valerenic acid and valerenol | [82] | |
Caricaceae | |||
Carica papaya | Antioxidant activity | tannins, pseudo tannin, flavonoids, glycosides, alkaloids | [83] |
Antihypertensive activity | quercetin, rutin, nicotiflorin, clitorin, and manghaslin | [84] | |
Wound healing activity | chymopapain and papain | [85] | |
Hepatoprotective activity | flavonoids | [86] | |
Digestive Health | vitamin c, carotenoids, flavonols, hydroxycinnamic acids | [87] | |
Caryophyllaceae | |||
Dianthus caryophyllus | Anticancer effect and antioxidant | 6-hydroxy kaempferol-3,6-o-diglucoside, 6-hydroxy kaempferol-7-o-glucoside, quercetin-3-o-sophoroside, and 2′-deoxyguanosine | [88] |
Antibacterial and antifungal | terpenoids and flavonoids | [89] | |
Costaceae | |||
Chamaecostus cuspidatus | Antioxidant activity | quercetin, kaempferol, phytol, | [90-91]
|
Anticancer activity | lupenone | ||
Antimicrobial activity | quercetin, kaempferol, and cis-9,10-epoxy octadecan-1-ol | ||
Antifungal activity | (z)-14-tricosenyl format | ||
Clusiaceae | |||
Garcinia cambogia | Anti-obesity | (−)-hydroxycitric acid | [92] |
Hypolipidemic activity | flavonoids and phenols | [31] | |
Antidiabetic activity | |||
Anti-inflammatory activity | 4,8-epi-uralione f, 4,8-epi-uralione g, uralione s, coccinone j, 6-epi-coccinone c, coccinone i, 36-hydroxy-guttiferone j, multiflora i, garcinia tibolone f and 36-hydroxy-garcinia gifolone f | [93] | |
Antioxidant activity, antibacterial | pyrogallol, catechin, catechol, epicatechin, chlorogenic, salicylic acid, flavonoids and isoflavonoids | [94] | |
Anti-ulcer activity | d (-)-erythro-hydroxycitric acid (hca) | [95] | |
Garcinia mangostana | Antioxidant activity | 8-hydroxycudraxanthone g, gartanin, α- mangostin, γ-mangostin and smith xanthone a | [96] |
Cucurbitaceae | |||
Cucumis melo | Antioxidant activity | phenolic and flavonoid compounds 3-hydroxybenzoic acid, chlorogenic acid, neochlorogenic acid, isovanillic acid, apigenin-7-α-glucoside, luteolin-7-o-glucoside, and quercetin-3-galactoside | [97] |
Anticancer; cardiovascular diseases | Phenols and flavonoids | [98-] | |
Momordica charantia | Hypoglycemic activity | polypeptide-p, charantin, momordenol, and momordicin | [100-101] |
Antibacterial activity | flavonoids, alkaloids and tannins | [102] | |
Antiviral | flavonoids | [103] | |
Anti-HIV | map30, | [104-106] | |
Anticancer activity | phenols | [107] | |
Abortifacient and antifertility | triterpenoid glycosides, flavonoids and alkaloids | ||
Anti-ulcer activity | saponins, sterols, mucilage, glycoside, alkaloids, steroidal saponins | [108] | |
Anthelmintic activity | quercetin | [109] | |
Antioxidant activity | gallic acid, caffeic acid and catechin | [110] | |
Siraitia grosvenorii | Antioxidant effects | α-l-arabinose, α-d-mannose, α-d-glucose, α-d-galactose, glucuronic acid, and galacturonic acid | [111] |
Anticancer effects | mogrosides | [112] | |
Ericaceae | |||
Vaccinium macrocarpon | anti-thrombotic, anti-inflammatory | polyphenols, phenolic acids (benzoic, hydroxycinnamic, and ellagic acids) and flavonoids (anthocyanins, flavonols, and flavan-3-ols) | [113] |
Vaccinium meridionale | Antioxidant activity | anthocyanins, hydroxycinnamic acids, flavonols, and procyanidins | [114] |
Euphorbiaceae | |||
Antidesma bunius | Antioxidant and anti-obesogenic | phenolics and anthocyanins, gallic acid, catechin, anthocyanin-3-glucoside, and protocatechuic acid | [115] |
Euphorbia hirta | Antimicrobial effect | alkaloid, flavonoid, saponin, terpenoid, steroid and sterols | [116] |
Antioxidant effect | reducing sugars, terpenoids, alkaloids, steroids, tannins, flavonoids and phenolic compounds | [117] | |
Anti-inflammatory, analgesic and antipyretic effects | β-amyrin, 24-methylene cycloartenol, and b-sitosterol | [118] | |
Fabaceae | |||
Aspalathus linearis | Antioxidant activity | dihydrochalcones aspalathin and nothofagin
| [119] |
Caesalpinia sappan L. | Anti Acne agent | brazilin | [120] |
Antimicrobial activity | steroids, tannin, phenol, saponins and flavonoids | [121] | |
Ceratonia siliqua | Antioxidant activity | gallic acid and gentisic acid | [122] |
Anti-hyperglycaemic | |||
Antihyperlipidemic properties | tannins | [123] | |
Gastrointestinal benefits | phenolic acids and flavonoids | [124] | |
Clitoria ternatea | Antimicrobial activities | tannin, phlobatannin, flavonoid, cardiac glycosides, volatile oils, steroids and terpenoids. | [125] |
Anti-inflammatory | phenols and flavonoids | [126] | |
Anticancer effect | alkaloids, saponins and flavonoids | [127] | |
Antioxidant activity | phenols and flavonoids | [128] | |
Senna | Antimicrobial activity | organic acid, flavan-3-ol, one flavone, glycosylated flavonols, proanthocyanidin dimers, and proanthocyanidin trimmers | [129] |
Antimalarial activity | piperidine | [130] | |
Antioxidant and hepatoprotective | phenols and flavonoids | [131] | |
Ginkgoaceae | |||
Ginkgo biloba | Antioxidant, and neuroprotective effect | quercetin, myricetin | [132-133] |
Grossulariaceae | |||
Ribes nigrum | Antispasmodic effect | quercetin | [134] |
Ribes rubrum | Antioxidant, anti-inflammatory, and antiplatelet | polyphenolic and flavonoid | [135] |
Lamiaceae | |||
Lavandula angustifolia | Antifungal activity | Linalool and linalyl acetate | [136] |
Antioxidants, anti-microbial, anti-cancer, anti-inflammatory and anti-diabetic effect | (-)-epicatechin, caffeic acid, gallic acid, hydroxytyrosol, kaempferol, and resveratrol, rosmarinic acid, caffeic acid, carnosol, p-coumaric acid, carnosic acid, luteolin, apigenin, and kaempferol, curcumin, colchicine, resveratrol, capsaicin, (-)-epigallocatechin, quercetin, myristicin, and elmicin, isoeugenol, coumarin, piperonal, scoparone, spathulenol, d-limonene, and myrcene | [137] | |
Mentha piperita L. | Antibacterial activity | terpenoids, steroids, phenols, flavonoids, alkaloids, and tannins | [138] |
Antioxidant activity | |||
Mentha spicata | Anti-Inflammatory | phenols and flavonoids | [139] |
Antidiabetic Activity | |||
Antioxidant Activity | |||
Monarda didyma L. | Antifungal activity | thymol, γ-terpinene, p-cymene, δ-3-carene, and myrcene | [140] |
Antioxidant activity | |||
Ocimum tenuiflorum | Antimicrobial activity | camphor, eucalyptol, and eugenol | [141] |
Antihyperglycemic activity | phenols and flavonoids | [142] | |
Origanum vulgare | Antibacterial and anticancer | carvacrol, terpinen, thymol, sabinine, linalool, terpinolene, quercetin, apigenin | [143] |
Antioxidant activity | thymol, gamma-terpinene, carvacrol, carvacrol methyl ether, cis-alphabisabolene, eucalyptol, p-cymene, and elemol | [144] | |
Premna odorata | Anti-inflammatory and Antioxidant | iridoids (monoterpenes), triterpenes, flavones, and phenylethanoids | [145] |
Antituberculosis | Phenols and flavonoids | [146] | |
Salvia rosmarinus | Antioxidant, Anti-inflammatory, and Anticancer | rosmarinic acid, luteolin-7-glucoside, rutin, ursolic acid, carnosol, and carnosic acid | [147] |
Thymus vulgaris | Antioxidant and antimicrobial | phenols | [148] |
Lauraceae | |||
Cinnamomum verum | Antioxidant | butylated hydroxyanisole, trolox, and ascorbic acid | [149] |
Persea americana | Antioxidant activity | hydrocarbon, sterols, and unsaturated fatty acids | [150] |
Anti-inflammatory activity | |||
Anticancer activity | |||
Wound healing activity | lutein, carotenoids, vitamins a and e, phospholipids, glycolipids, (z,z)-1-(acetyloxy)-2-hydroxy-12,15- heneicosane-4-one, andpersenone a and b | [151] | |
Lythraceae | |||
Lagerstroemia speciosa | Antidiabetic property | triterpenes, tannins, ellagic acids, glycosides and flavonoids | [152] |
Malvaceae | |||
Althaea officinalis | Antimicrobial activity | omega-3, palmitic acid, heptacosane, nonacosane, palmitic acid, linoleic acid (omega-6), and naphthalene decahydro 2, 6- dimethyl | [153] |
Hibiscus | Breast cancer | phenols and flavonoids | [154] |
Hibiscus sabdariffa | Antioxidant and antibacterial | anthocyanins, flavonoids and polyphenols | [155] |
Anti Aging assays | phenols and flavonoids | [156] | |
Malva | Antimicrobial activities | polysaccharides, coumarins, flavonoids, polyphenols, vitamins, terpenes, and tannins | [157] |
Antioxidant efficacy, Wound healing activity, Anti-inflammatory, Anti Osteoclastogenic | [158] | ||
Tilia americana | Anticonvulsant activity | tiliroside | [159] |
Moringaceae | |||
Moringa oleifera | Antioxidant properties, Hypolipidemic effects | polyphenols | [160] |
Anti-inflammatory | quercetin, kaempferol glycosides, glucoside malonates, acetyl glycosides, and succinoyl glycosides | [161] | |
Anticancer properties | gallic acid, quercetin and kaempferol | [162] | |
Myrtaceae | |||
Psidium guajava | Antioxidant | phenolic compounds | [163] |
Nelumbonaceae | |||
Nelumbo nucifera | Antioxidant, Cytoprotective, and Anti-angiogenic effect | rutin, catechin, sinapic acid, chlorogenic acid, syringic acid and quercetin | [164] |
anti-obesity, Antidiabetic | polyphenolics, flavonoids, and tannic acid | [165] | |
Oleaceae | |||
Jasminum spp | Antimicrobial activity and antioxidant | alkaloids, flavonoids (rutoside), terpenes, phenols, and iridoid glucosides | [166] |
Anti-inflammatory activity | alkaloids, flavonoids, saponins, tannins, and sterols | [167] | |
Chemopreventive | alkaloids, tannins, carbohydrates, sterols and terpenoids, flavonoids, cardiac glycosides, proteins and amino acids. | [168] | |
Paeonaceae | |||
Paeonia | Antioxidant activity | Kaempferol, luteolin, apigenin, isosalipurposide, quercetin | [169] |
Cytoprotective | paeoniflorin | [170] | |
Pandanaceae | |||
Pandanus amaryllifolius | Hepatoprotective effects | tannins, alkaloids, saponins, terpenoids and flavonoid | [171] |
Anti-obesity, hypertension, hyperglycemia and dyslipidemia | phenols and flavonoids | [172-173] | |
Antioxidant and anticancer | rutin, epicatechin, naringin, catechin, kaempferol, gallic acid, cinnamic acid, and ferulic acid | [174] | |
Antiviral activity | pandanin | [175] | |
Antimicrobial | alkaloids, flavonoids, phenols, tannins, steroids, terpenoids, and carbohydrates compounds | [176] | |
Passifloraceae | |||
Passiflora edulis | Anti-inflammatory, hypoglycemic and hypertriglyceridemia | pectin | [177] |
Phyllantaceae | |||
Phyllanthus niruri | Antioxidant, anti hepatoprotective | phenolic compounds, phyllanthin and hypophyllanthin | [178-179] |
Gastroprotective effect | |||
Poaceae | |||
Bambusa vulgaris | Antimicrobial activity | alkaloids, tannins, flavonoids, phenols, terpenoids | [180] |
Cymbopogon citratus | Antibacterial activity | α-citral (geranial) and β-citral (neral) | [181-182] |
Anti-inflammatory, antifungal | essential oils | [183] | |
Anti-obesity and antihypertensive | limonene, granite, citral, graminon, myrcene, and linalool | [184] | |
Antioxidant activity | flavonoids | [185] | |
Anti-HIV activity | not mentioned | [186] | |
Eleusine indica | Antidiabetic | flavonoids | [187] |
Oryza sativa | Antioxidant and anti-inflammatory | glutamic acid (glu), leucine (leu), aspartic acid (asp), arginine (arg) and alanine (ala). however, drb also contained cysteine (cys), glycine (gly), histidine (his), methionine (met), phenylalanine (phe), tryptophan (trp) and tyrosine (tyr) | [188] |
Polygonaceae | |||
Rheum rhabarbarum | Antioxidant activity | flavan-3-ols, flavonols, anthocyanins and gallotannin | [189] |
Anti-inflammatory | rhapontigenin and rhaponticin, typical stilbenes | [190] | |
Anticoagulant effect | |||
Punicaceae | |||
Punica granatum | Antibacterial | polyphenols, tannins, flavonoids and anthocyanins (cyanidins, delphinidins) | [191] |
Rosaceae | |||
Crataegus monogyna | Antioxidant and antimicrobial | polyphenols and flavonoids | [35] |
Fragaria ananassa | Antiproliferative, anti-type 2 diabetes, and antihypertensive | ellagitannins and ellagic acid | [192] |
Malus domestica | Antioxidant activity | quercetin and rutin | [193] |
Hepatoprotective and inhibit hepatic steatosis | flavonoid | [194] | |
Gastroprotective | phenolic compounds | [195] | |
Gastroprotective | phenolic acids (protocatechuic acid glucoside, (neo)chlorogenic acid, 4- hydroxybenzoic acid glucoside, chlorogenic acid, and vanillic acid glucoside), coumarins (aesculetin and its glucoside derivative), dihydrochalcones glucosides (phloretin glucoside, phloretin pentosyl-glucoside, and phlorizin) and flavonoids (kaempferol, quercetin and their mono and dimer glycosides) | [196] | |
Prunus armeniaca | Anticancer potential | amygdalin | [197] |
Prunus avium | Antioxidant capacity | hydroxycinnamic acids, anthocyanins, flavan-3-ols, flavonol | [198] |
Prunus persica | Antimicrobial activity | phenolics | [199] |
Antitumor activity | glycosides | [200] | |
Antioxidant activity | phenolic and flavonoid | [201] | |
ascorbic acid, citric acid and α- tocopherol | [202] | ||
Anti-allergic | polyphenolics and flavonoids | [203] | |
Anticancer activity | polyphenolics | [204] | |
Pyrus communis | Antioxidant, anti-inflammatory, and antiproliferative activity | phenolic acids, chlorophyllide a, 9-cis-β-carotene, ursolic acid, polyphenols and carotenoids | [205] |
Rosa rubiginosa | Antioxidant activity | ascorbic acid and phenolic compounds | [206] |
Rubus idaeus | Lower weight, ambulatory activity | phenolics | [207] |
Rubiaceae | |||
Gardenia jasminoides | Hepatoprotective activity | geniposide, crocins and crocetin | [208] |
Anti-inflammatory activity | crocetin | [209] | |
Antidepressant activity | genipin and crocin | [210] | |
Gastroprotective | genipin and ursolic acid | [211] | |
Antithrombotic activity | geniposide and genipin | [212] | |
Rutaceae | |||
Citrus japonica | Antioxidant, cytoprotective action | limonene, germacrene d, dodecanol-1 and linolenic acid | [213] |
Citrus limon | Antioxidant activity | phenolics and flavonoids | [214] |
lipoc acid, α- tocopherol, and ascorbic acid | [215] | ||
hesperidin and eriocitrin | [216] | ||
limonene, y-terpinene, and β- pinene | [217] | ||
Citrus sinensis | Antimicrobial | phenolics | [218] |
Antifungal | limonene, β-myrcene, β- pinene, α- pinene, citral z and e | [219] | |
Antiproliferative | arabinose, galactose, xylose, rhamnose, mannose, and glucose | [220] | |
Antioxidant activity | carotenoids, phenolics, α- tocopherol, and physterols | [221] | |
Hypocholesterolemic | pectin oligosaccharides | [222] | |
Anti-obesity activity | flavanone aglycones | [223] | |
Sapindaceae | |||
Dimocarpus longan | Hypoglycemic activity | gallic acid and ellagic acid | [224] |
Litchi chinensis | Antioxidant | (−)-epicatechin, quercetin 3-o-rutinoside-7-o-α-l rhamnosidase and quercetin 3-o-rutinoside (rutin) | [225] |
Solanaceae | |||
Lycium ruthenicum | Antioxidant activity | anthocyanins | [226] |
Antidiabetic potential | anthocyanins | [227] | |
Anti-fatigue activities | polyphenols | [228] | |
Theaceae | |||
Camellia sinensis | Anti-aging activity | epigallocatechin gallate, epigallocatechin, and epicatechin gallate | [229] |
Anti-Alzheimer activity, antistroke, | fatty acids, vitamin e, squalene, phytosterol, flavonoids, and polyphenols | [230] | |
Anti-parkinson activity | quercetin | [231] | |
Cardiovascular diseases | theanine and quercetin | [232] | |
Anticaries activity | (––)-epigallocatechin gallate and (––)-epicatechin gallate | [233] | |
Antimutagenic | phenolic and flavonoid | [234 | |
Anti-obesity activity | epigallocatechin gallate | [235] | |
Antioxidant, anti-inflammatory | theaflavin | [236] | |
Anticancer, antidiabetic, antimicrobial, and skin inflammation | catechins | [237] | |
Urticaceae | |||
Urtica Dioica | Antiasthmatic activity | phenol (gallic acid) | [238] |
Antibacterial, antioxidant, immunomodulatory | caffeoylmalic acid, caffeoylmalic acid dimer, and ascorbic acid | [239] | |
Prevention of atherosclerosis | alkaloids and saponins | [240] | |
Antiulcer activity, Analgesic activity, antioxidant, anti-apoptotic, anti-inflammatory, antifungal, and antimicrobial | melatonin and β- carotene | [241] | |
Hyperglycaemic, Hypoglycaemic | flavonoids, phenolics, gallic acid, and rutin | [242] | |
Antihypertensive effect | atropin | [243] | |
Anti-HIV | lectin | [244] | |
[245] | |||
Vitaceae | |||
Vitis vinifera | Antioxidant capacity | melatonin | [246] |
Neuroprotective | phenolics acid (gallic acid) and flavonoids (flavonoids) | [247] | |
Vitis coignetiae | Anticancer | anthocyanins | [248] |
Vitaceae | |||
Vitex negundo | Anti-inflammatory and antioxidant | 3,4,9-trimethyl-7-propyl octanoic acid | [249] |
Zingiberaceae | |||
Elettaria cardamomum | Antioxidant activity | phenolics, and flavonoids | [250] |
Zingiber officinale | Antioxidant | flavonoids, polyphenols, and tannin | [251] |
Peptic ulcer | alkaloid, steroids, terpenoids, flavonoids, and resins | [252] | |
Anti-inflammatory | |||
Antiemetic, anxiolytic, anticonvulsant | gingerol | [253] |
C. limon, commonly known as Lemon, is a key ingredient in various teas, including The Good Harvest Dried Fruit and Tea Infusion, Craftea Nutty Blueberry Balm, and Twinings of London teas. These teas claim medicinal benefits, asserting they have antioxidant properties to prevent heart diseases like heart attacks or strokes, are rich in Vitamin C, and can enhance collagen production. Lemon is recognized for its bioactive compounds, including flavonoids, phenolic acids, and vitamins. The antioxidant effect, attributed to flavonoids like hesperidin and hesperetin, can combat free radicals [254]. Moreover, Vitamin C in Lemon protects DNA from mutations and inhibits free radical production. Research indicates that dermocosmetics containing Vitamin C from C. limon contribute to increased collagen production when applied externally, promoting smoother and tighter skin. When combined with Vitamin E, it acts synergistically as an antioxidant, reducing fine wrinkles and slowing down the aging process [255]. The scientific studies conducted on this medicinal plant, Lemon, likely play a crucial role in determining the effectiveness of the teas mentioned above.
The plant species J. sambac Linn is a prominent ingredient in Craftea Nutty Brainy and Savvy herbal tea, with claims to alleviate headache and migraine symptoms. A research study has verified that the ethanolic extract of J. sambac Linn leaves possesses antinociceptive activity. This pain-relieving effect is attributed to the presence of bioactive compounds in the plant, including alkaloids, tannins, flavonoids, and glycosides [256]. Consequently, the inclusion of this plant enhances the effectiveness of the mentioned tea in addressing pain-related issues.
A mixture of various medicinal plant species is evident in herbal teas, such as the Rita Ritz Pito-Pito Dried Herbal Tea. This mixture includes Lagerstroemia speciosa, Psidium guajava, Mangifera indica, Pandanus amaryllifolius, Centella asiatica, Pimpinella anisum, and Premna odorata. The tea is claimed to offer a range of health benefits, including lowering blood sugar, promoting healthy gums, alleviating symptoms of loose bowels, exhibiting antibacterial properties, acting as a pain reliever, aiding in wound healing, muscle relaxation, providing gastric protection, supporting the digestive system, and even contributing to the treatment of tuberculosis. The medicinal plant C. asiatica is noted for its antidiabetic activity attributed to asiaticoside, which facilitates increased insulin levels and enhances the secretion of healthy pancreatic β-cells. Additionally, it demonstrates significant wound healing activity in both normal and delayed healing models, with asiaticoside being the primary active constituent [257]. P. anisum, containing a high level of trans-anethole, exhibits wound contraction and proven wound-healing activity [258]. This plant also provides gastric protection through its anti-ulcer activity, linked to chemical constituents like α-Zingiberene, Ar-curcumene, β-Bisabolene, β-Pinene, etc. [259]. Furthermore, L. speciosa showcases antibacterial activity primarily due to the presence of bioactive compounds such as proteins, amino acids, glycosides, alkaloids, terpenoids, saponins, phytosterols, flavonoids, etc. [260]. The chemical compounds identified in these medicinal plants substantiate the claims associated with the tea's health benefits.
Leaves, commonly used in teas, are recognized for their richness in active compounds such as alkaloids, tannins, coumarins, flavonoids, essential oils, and inulins. These compounds, crucial in many herbal remedies, are produced and stored through photosynthesis in leaves [261]. Compared to other plant parts, leaves have the highest concentration of secondary metabolites, contributing to antibacterial, antioxidant, antibiotic, and antidiabetic properties [262-263]. Moreover, leaves are the most abundant and easily collectible plant parts, facilitating plant conservation. Utilizing diverse leaf extracts ensures better preparation of active components for medications [264].
The current investigation highlights that the predominant biological activity identified in medicinal plants is antioxidant activity. A study showed that plants naturally have antioxidants, both enzymatic (e.g., proteins) and non-enzymatic (e.g., flavonoids and polyphenols) antioxidants. These antioxidants act as a defense system, helping plants deal with different types of stress and keeping them healthy [265]. As an example, medicinal plants like C. limon, Prunus persica, and P. anisum were extensively studied and demonstrated a robust correlation with antioxidant activity. A previous study reveals that phytochemical screening from the fruit of C. limon exhibits antioxidant activity due to its bioactive compounds, such as catechin, rutin, tannic, gallic, and vanillic acids that were detected in the peel, whereas in pulp quercetin, tannic and gallic acids were found [266]. Also, different solvent extraction of this medicinal plant shows great source of phenolic compounds, flavonoids and Vitamin C. Bioactive compounds such as carotenoids, phenolic compounds, ascorbic acid, fibers, and pectins give a strong correlation to its antioxidant properties [267]. This plant is a key ingredient in various popular tea brands like Twinings of London, The Good Harvest, Craftea Nutty, and Ahmad Tea. These teas claim to enhance the immune system, stimulate collagen production, and reduce blood pressure. The antioxidants, particularly Vitamin C, present in the plant, are believed to contribute to lowering oxidative stress, thereby lowering blood pressure and providing protection against damage caused by free radicals [268]. Clinical studies on Vitamin C have affirmed its positive effects on the skin, emphasizing its role in collagen formation [269-270]. Therefore, the medicinal claims associated with these teas find support in multiple research studies.
P. persica is a rich source of bioactive compounds particularly phenols such as gallic acid (3,4,5-trihydroxybenzoic acid), protocathechuic acid, protocatechualdehyde, chlorogenic acid, p-Coumaric acid, and ferulic acid which contributes to its antioxidant activity [271]. This medicinal plant, known for its diverse health benefits, is a key ingredient in various teas, including Ahmad Tea Beauty, Flower Tea, and Herbal Slimming Tea. The teas claim to support internal cleansing, boost thermogenic activity (heat production), aid in weight loss, act as a gentle laxative for eliminating excess fats and toxins, address skin issues, and promote better sleep. Some of these claims are supported by scientific research. For instance, a study confirms that gallic acid extracted from P. persica has free radical scavenging activity, contributing to various biological activities like reducing cholesterol levels and providing a protective effect on the skin [272]. It's important to note that some claims may be attributed to the combined medicinal properties of multiple plants in the tea mixture.
Previous study reveals that P. anisum has main phenolic compounds that are responsible for its antioxidant potential such as naringin, chlorogenic acid, quercetin, gallic acid, and rosmarinic acid [273]. It was reported that naringin was the main phenolic compound of ethyl acetate aniseed extract that is known as a strong antioxidant and scavenger of free radicals [274-275]. This medicinal plant is an ingredient in RITA RITZ Pito-Pito Dried Herbal tea, combined with other medicinal plants. The tea is renowned for its diverse benefits, claiming to lower blood sugar, promote healthy gums, relieve pain, aid wound healing, relax muscles, provide gastric protection, support the digestive system, and even contribute to tuberculosis treatment. Scientific studies confirm the antioxidant potential of naringin, a bioactive compound, suggesting a significant hypoglycemic (blood sugar-lowering) effect [276-277]. This scientific basis supports the tea's claim of lowering blood sugar. A previous study highlights naringin's therapeutic benefits in addressing conditions such as gastric ulcer and lung cancer by modulating protein expressions.
Aside from antioxidant properties, some medicinal plant species exhibit anti-inflammatory and antimicrobial properties. An earlier investigation focused on the extraction of Malva species (Malva sylvestris L.), revealing that malvidin 3‐glucoside is the primary bioactive compound responsible for its anti-inflammatory effect. Subsequent research identified rutin, a common flavonoid in this plant, as another potential phytochemical ingredient for treating chronic inflammation or serving as a promising functional food [278]. Recent studies have uncovered that the same Malva species includes 8-hydroxy-flavonoid sulphates and flavonoid glycosides, displaying bioactivity suitable for treating inflammatory diseases [279]. Moreover, another species within the Malva genus, Malva parviflora, has been identified to possess two compounds, oleanolic acid and scopoletin, which are responsible for its anti-inflammatory effect [280]. While these results may not directly validate the medicinal claim of the tea (PURETEA 14 Day Skinny Tea) regarding weight loss, various studies have explored the connection between anti-inflammatory effects and weight loss. It is mentioned that weight loss plays a crucial role in reducing inflammation, leading to a decrease in inflammation markers in the white adipose tissue of obese subjects [281]. In addition, P. amaryllifolius also exhibits antimicrobial properties. The extraction from the leaves of this medicinal plant contains bioactive compounds, including pandamarilactonine-A, B, C, piperidine (1 and 2), pyrrolidine (3 and 4), norpandamarilactonine-A, -B, pandamarilactone-1, pandamarine, and pandanamine, which belong to the alkaloid category. These alkaloids exhibit antibacterial properties [282], [283]. Additionally, the leaves of this plant release various secondary metabolites such as quercetin, carotenoids, tocopherols, tocotrienols, and essential oils, showcasing antitubercular activities against M. tuberculosis [284]. Pandanin, found in this plant, also demonstrates antiviral activities against human viruses, including herpes simplex virus type-1 (HSV-1) and influenza virus (H1N1) [285]. The significant phenolic content is suggested to be a major contributor to its antimicrobial activities against oral bacteria [286]. Several claims of RITA RITZ Pito-Pito Dried Herbal tea, such as its ability to lower blood sugar, promote healthy gums, provide pain relief, aid in wound healing, muscle relaxation, gastric protection, support the digestive system, and cure tuberculosis, were validated through the pharmacological activity of the medicinal plants within the tea. This pharmacological activity plays a crucial role in the effectiveness of the tea.
The 98 medicinal plants revealed that phenolic compounds, flavonoids, and alkaloids are the predominant bioactive constituents found in these plants. Flavonoids possess several medicinal benefits, including anticancer, antioxidant, anti-inflammatory, and antiviral properties [287] and flavonoids rutin, quercetin, narigenin, hesperitin, kaempferol, anthoxanthins, and isoflavonoids are examples. In addition, phenolic compounds are vital in defense responses, such as anti-aging, anti-inflammatory, and antioxidant effects [288]. Common phenolic compounds are gallic acid, caffeic acid, ferulic acid, ellagic acid, and rosmarinic acid. They are found abundantly in plant food and beverages, which play vital parts in pabulum and healthcare. Alkaloids have been widely studied owing to their beneficial biological properties, [289] antimalarial, antibacterial, antifungal, anti-inflammatory, and analgesic activity. Different alkaloids include piperidine, purine, and isoquinoline.
These bioactive compounds that were discovered in the 98 medicinal plants vary in their chemical structures and biological activities, however, they are both beneficial to human health and have numerous potential medical applications. For instance, flavonoids and phenolic compounds are used as antioxidants, anti-inflammatory drugs, anticancer drugs, and even have potential for managing type 2 diabetes [290-291]. Alkaloids are known to have muscle relaxant properties, antibacterial, antifungal, antitubercular, antidiabetic and anticancer [292].
The efficacy and safety of herbal teas are crucial, especially for consumers who rely on their medicinal benefits that could treat their illnesses. Although some therapeutic claims of these commercialized herbal teas were validated by some laboratory-based investigations, there are still several plant species contained in herbal teas that are less investigated and provide less information about their purported activities. Additionally, limited studies were conducted about the toxicity of each plant to human health. Herbal teas have been made from a wide variety of plants, either separately or in combination, but research into how those plants interact biochemically is still lacking.
Given the diverse composition of various plants present in herbal teas, thorough laboratory investigations are essential to explore the biochemical reactions linked to the bioactive compounds in each plant, particularly those sharing similar medicinal properties/functions. This research is essential for assessing the efficacy of herbal teas and holds the potential for establishing a pharmacological foundation for future medical development. This study also recommends additional research on the biochemical analysis of each medicinal plant's natural compounds, particularly to determine any potential toxicity or adverse reactions that can help more in revealing the underlying structure and relationships between medicinal plants and medicinal properties.
Acknowledgements
The author would like to thank to Department of Science and Technology- Accelerated Science and Technology Human Resource Development Program (DOST- ASTHRDP) for financial support by granting a scholarship and the Department of Biological Sciences, Mindanao State University-Iligan Institute of Technology for their support and the Center of Integrative Health, Premier Research Institute of Science and Mathematics (PRISM) for the use of the facilities.
Funding: No funding sources.
Conflict of interest: None declared.
Ethical approval: The study was approved by the Institutional Ethics Committee of Mindanao State University-Iligan Institute of Technology.