Hermetica Superfood Encyclopedia
The Short Answer
Camellia sinensis is the tea plant containing catechins like EGCG that provide antioxidant activity by scavenging free radicals and inhibiting oxidative enzymes. The polyphenolic compounds may support cardiovascular health and cellular protection through multiple antioxidant pathways.
CategoryHerbs (Global Traditional)
GroupTraditional Chinese Medicine
Evidence LevelStrong
Primary KeywordCamellia sinensis benefits
Synergy Pairings3
Camellia sinensis (Tea Plant) — botanical close-up
Health Benefits
Origin & History
Natural habitat
Camellia sinensis is an evergreen shrub native to East Asia, particularly China, known for producing tea leaves used in beverages and extracts. Leaves are typically dried, ground, and extracted using solvents like n-hexane for squalene or water-based methods for catechins.
“While the research dossier does not cover historical use, Camellia sinensis has been traditionally used in Chinese medicine. Its leaves have been utilized for centuries in tea preparation, believed to have various health benefits.”Traditional Medicine
Scientific Research
The research does not provide specific human clinical trials or meta-analyses with PubMed PMIDs for Camellia sinensis extracts. Available data focus on extraction optimization and phytochemical analysis, lacking evidence on clinical outcomes in humans.
Preparation & Dosage
Traditional preparation
No clinically studied dosage ranges are detailed in the research. Studies focus on extraction methods and quantify catechins but do not provide dosing guidelines. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Camellia sinensis (dried tea leaves) contains the following key components per 100g dry weight: Protein: 20–30g (moderate bioavailability; contains all essential amino acids including theanine, a unique non-protein amino acid at 1–2% dry weight); Carbohydrates: 40–50g (including cellulose, hemicellulose, and pectin; low digestible fiber ~10–15g); Fat: 2–5g (including trace squalene extractable via n-hexane, approximately 0.1–0.5mg/g dry leaf). Bioactive polyphenols dominate the profile: Catechins total 12–24% dry weight in green tea leaves, comprising EGCG (epigallocatechin gallate) at 9–13%, EGC at 3–6%, ECG at 3–6%, and EC at 1–3%; bioavailability of catechins is moderate (estimated 1.68% for EGCG in humans). Caffeine: 2–4% dry weight. Theobromine: ~0.2%. Flavonoids (quercetin, kaempferol, myricetin): 0.3–0.5%. Vitamins: Vitamin C (ascorbic acid) 150–250mg/100g in fresh leaves (largely degraded during processing); Vitamin K1 approximately 700–900mcg/100g dry weight (notably high); B-vitamins including riboflavin (~1.3mg/100g) and folate (~45mcg/100g). Minerals: Fluoride 98–482mg/kg dry weight (notably high, bioavailability ~70–90%); Manganese 300–600mg/kg dry weight (high; bioavailability ~5%); Potassium 1,900–2,200mg/100g; Calcium 300–400mg/100g (low bioavailability due to oxalate binding); Magnesium 150–200mg/100g; Zinc 3–5mg/100g; Selenium variable 0.1–1.5mg/kg depending on soil. Chlorophyll: 0.5–1.0% in green tea. Theanine bioavailability is high (~58% absorbed in small intestine). Tannins present at 10–20% may reduce iron and zinc absorption when consumed with meals.
How It Works
Mechanism of Action
Catechins in Camellia sinensis, particularly epigallocatechin gallate (EGCG), exert antioxidant effects by chelating metal ions and scavenging reactive oxygen species. These polyphenols inhibit enzymes like xanthine oxidase and lipoxygenase while modulating cellular signaling pathways including NF-κB and MAPK. The squalene content may support skin barrier function through its emollient properties and integration into cell membranes.
Clinical Evidence
Research on Camellia sinensis focuses primarily on in vitro antioxidant capacity studies measuring polyphenol content and free radical scavenging ability. Human clinical trials examining specific health outcomes are limited in the available research data. Extraction studies show variable catechin concentrations depending on processing methods, with EGCG being the most abundant active compound. Evidence for clinical benefits remains preliminary and requires further human intervention studies.
Safety & Interactions
Camellia sinensis is generally recognized as safe when consumed as tea, though concentrated extracts may cause gastrointestinal upset in sensitive individuals. Caffeine content can interact with stimulant medications and may cause sleep disturbances if consumed in large quantities. High doses of catechins, particularly EGCG supplements, have been associated with rare cases of hepatotoxicity. Pregnant women should limit consumption due to caffeine content and potential effects on iron absorption.
Synergy Stack
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Also Known As
Camellia sinensisTea PlantGreen TeaBlack TeaChaTea BushTea TreeThea sinensis
Frequently Asked Questions
What is the main active compound in Camellia sinensis?
The primary bioactive compounds are catechins, with epigallocatechin gallate (EGCG) being the most abundant and well-studied. These polyphenolic compounds provide the majority of the antioxidant activity associated with tea consumption.
How much EGCG is in Camellia sinensis tea?
EGCG content varies significantly by processing method and tea type, typically ranging from 25-100mg per cup of green tea. Black tea contains lower levels due to oxidation during processing, while green tea retains higher catechin concentrations.
Can Camellia sinensis extract cause liver problems?
High-dose concentrated EGCG supplements (above 800mg daily) have been associated with rare cases of hepatotoxicity in sensitive individuals. Regular tea consumption at normal levels is considered safe, but concentrated extracts should be used with caution.
Does Camellia sinensis interact with blood thinners?
Camellia sinensis may enhance the effects of anticoagulant medications due to its catechin content potentially affecting platelet aggregation. Patients on warfarin or other blood thinners should maintain consistent tea consumption and monitor INR levels with their healthcare provider.
What's the difference between green and black tea Camellia sinensis?
Both come from the same Camellia sinensis plant but undergo different processing methods. Green tea is minimally oxidized, preserving higher levels of catechins like EGCG, while black tea is fully oxidized, creating theaflavins and thearubigins but reducing catechin content.
Is Camellia sinensis safe during pregnancy and breastfeeding?
While moderate tea consumption is generally considered safe during pregnancy, high intakes of Camellia sinensis may pose risks due to caffeine content and potential effects on iron absorption. Pregnant and breastfeeding women should consult their healthcare provider about appropriate consumption levels, as caffeine crosses the placenta and passes into breast milk. Most medical authorities suggest limiting tea intake to 1–2 cups daily during pregnancy.
What is the most bioavailable form of Camellia sinensis for supplements?
Freshly brewed tea delivers catechins with higher bioavailability than dried extracts, as heat-processing and storage can degrade polyphenols. Standardized green tea extracts concentrated for EGCG content show improved absorption compared to whole leaf powder, though some studies suggest drinking tea may offer synergistic benefits from co-occurring compounds. The bioavailability of catechins from Camellia sinensis is enhanced when consumed with vitamin C or on an empty stomach.
Does Camellia sinensis supplementation require specific timing to be effective?
Camellia sinensis can be consumed at any time of day, though morning or early afternoon consumption may be preferable to minimize sleep disruption from caffeine content. For maximum antioxidant absorption, consuming tea or extracts with meals containing healthy fats (such as nuts or olive oil) may enhance catechin bioavailability. Spacing supplementation 2–3 hours apart from iron-rich meals can help minimize interference with iron absorption.
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