# Mao Jian Green Tea (Camellia sinensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/mao-jian-green-tea
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Tea Cultivars
**Also Known As:** Camellia sinensis, Duyun Maojian, Guizhou Mao Jian, Maojian Green Tea, Chinese Mao Jian, Duyun Green Tea, 毛尖绿茶

## Overview

Mao Jian Green Tea (Camellia sinensis) is a Chinese green tea cultivar rich in catechins, particularly epigallocatechin gallate (EGCG) and epicatechin gallate (ECG), which neutralize free radicals through direct electron donation. These polyphenols also upregulate endogenous antioxidant enzymes such as superoxide dismutase and catalase, providing systemic [oxidative stress](/ingredients/condition/antioxidant) protection.

## Health Benefits

• [Antioxidant protection](/ingredients/condition/antioxidant) through catechins (EGCG, ECG) that scavenge free radicals - based on in vitro studies showing 0.348-0.374 TOSC/μM activity
• Enhanced antioxidant enzyme activity - demonstrated in animal studies at 125-1250 mg/kg green tea extract doses
• Liver protection against toxicity - shown in studies where 10 mg/L extract protected against acetaminophen-induced damage
• Potential [cardiovascular](/ingredients/condition/heart-health) support through polyphenol content - based on general green tea research, not Mao Jian-specific studies
• Possible metabolic benefits - traditional use suggests hypoglycemic effects, though no clinical trials available

## Mechanism of Action

EGCG and ECG in Mao Jian Green Tea scavenge [reactive oxygen species](/ingredients/condition/antioxidant) through hydrogen atom transfer and electron donation, measured at 0.348–0.374 TOSC/μM activity in vitro. These catechins also activate the Nrf2/Keap1 signaling pathway, upregulating antioxidant response element (ARE)-dependent genes including heme oxygenase-1 (HO-1), superoxide dismutase (SOD), and catalase (CAT). Additionally, EGCG inhibits pro-[inflammatory pathway](/ingredients/condition/inflammation)s such as NF-κB, reducing cytokine-mediated oxidative burden and contributing to [hepatoprotective](/ingredients/condition/detox) effects observed in animal models.

## Clinical Summary

Preclinical animal studies using green tea extract doses of 125–1250 mg/kg have demonstrated enhanced antioxidant enzyme activity and [hepatoprotective](/ingredients/condition/detox) effects against chemically induced liver toxicity. In vitro assays confirm Mao Jian catechins exhibit measurable [free radical scaveng](/ingredients/condition/antioxidant)ing capacity (TOSC/μM range 0.348–0.374), competitive with other high-grade green tea varieties. Human clinical evidence specific to the Mao Jian cultivar remains limited, with most translatable data extrapolated from broader Camellia sinensis green tea trials. Overall, the current evidence base is preclinical and mechanistic; robust randomized controlled trials in humans are needed to confirm therapeutic dosages and clinical endpoints.

## Nutritional Profile

{"macronutrients": {"protein": "0.2-0.5 g per 100 ml brewed tea", "fiber": "Negligible"}, "micronutrients": {"vitamins": {"Vitamin C": "1-2 mg per 100 ml brewed tea"}, "minerals": {"Potassium": "10-20 mg per 100 ml brewed tea", "Calcium": "1-2 mg per 100 ml brewed tea", "Magnesium": "1-2 mg per 100 ml brewed tea"}}, "bioactive_compounds": {"Catechins": {"EGCG": "50-100 mg per 100 ml brewed tea", "ECG": "20-40 mg per 100 ml brewed tea"}, "Caffeine": "15-30 mg per 100 ml brewed tea", "L-theanine": "5-10 mg per 100 ml brewed tea"}, "bioavailability_notes": "Catechins are more bioavailable when consumed with vitamin C; absorption of catechins can be reduced by dairy."}

## Dosage & Preparation

No clinically studied dosage ranges specific to Mao Jian Green Tea are available. General green tea infusions deliver 50-400 mg catechins per cup depending on steeping, with EGCG levels ranging from 117-442 mg/L and EGC from 203-471 mg/L in typical preparations. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Mao Jian Green Tea is generally well tolerated at typical dietary consumption levels, but high-dose concentrated extracts (above 800 mg EGCG/day) have been associated with hepatotoxicity, nausea, and gastrointestinal discomfort in human case reports. Catechins can inhibit the absorption of iron from non-heme dietary sources, making co-consumption with iron supplements inadvisable. EGCG may interact with anticoagulant medications such as warfarin by inhibiting platelet aggregation, and may reduce the bioavailability of certain beta-lactam antibiotics and statins via CYP3A4 modulation. Pregnant and breastfeeding individuals should limit intake due to caffeine content and theoretical folate absorption interference at high doses.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses specific to Mao Jian Green Tea were identified in the research. Available evidence comes from in vitro and animal studies on general green tea (Camellia sinensis) extracts demonstrating [antioxidant](/ingredients/condition/antioxidant) effects through catechin activity.

## Historical & Cultural Context

While no specific traditional use data for Mao Jian Green Tea was found, general Camellia sinensis green tea has been used in Traditional Chinese Medicine for centuries. Traditional applications include [antioxidant](/ingredients/condition/antioxidant), anticancer, hypoglycemic, antibacterial, [antiviral](/ingredients/condition/immune-support), and [neuroprotective effect](/ingredients/condition/cognitive)s.

## Synergistic Combinations

Vitamin C, Quercetin, L-Theanine, Curcumin, Resveratrol

## Frequently Asked Questions

### What makes Mao Jian Green Tea different from regular green tea?

Mao Jian is a specific Chinese green tea cultivar distinguished by its needle-shaped leaves, high catechin density, and a polyphenol profile showing EGCG and ECG concentrations that produce in vitro TOSC activity of 0.348–0.374 μM, comparable to premium Japanese cultivars. Its minimal oxidation during processing preserves a higher percentage of bioactive catechins relative to oolong or black tea from the same plant species, Camellia sinensis.

### How much Mao Jian Green Tea extract is needed for antioxidant benefits?

Animal studies have used green tea extract doses of 125–1250 mg/kg body weight to demonstrate enhanced SOD and catalase activity, but direct human equivalent dosing for the Mao Jian cultivar has not been established in clinical trials. General green tea extract guidelines suggest 400–800 mg/day of standardized EGCG for antioxidant effects in humans, though doses above 800 mg/day EGCG increase hepatotoxicity risk and should be avoided without medical supervision.

### Can Mao Jian Green Tea protect the liver?

Preclinical animal studies using Camellia sinensis green tea extracts have shown hepatoprotective effects against chemically induced liver toxicity, attributed primarily to EGCG's ability to suppress NF-κB-driven inflammation and upregulate Nrf2-mediated antioxidant defenses. However, paradoxically, high-dose isolated EGCG supplements have been linked to drug-induced liver injury in humans, suggesting that whole-leaf tea consumption carries a much safer hepatic profile than concentrated extracts.

### Does Mao Jian Green Tea contain caffeine?

Yes, Mao Jian Green Tea contains caffeine, typically ranging from 20–45 mg per 8 oz brewed cup depending on leaf grade, water temperature, and steeping time, which is lower than coffee (80–100 mg) but significant for caffeine-sensitive individuals. The caffeine in green tea acts synergistically with L-theanine, an amino acid also present in Camellia sinensis, to produce a modulated stimulant effect with reduced jitteriness compared to equivalent caffeine from other sources.

### Are there any drug interactions with Mao Jian Green Tea supplements?

EGCG from Mao Jian Green Tea can inhibit CYP3A4 and P-glycoprotein drug transporters, potentially altering plasma levels of statins, certain chemotherapy agents, and immunosuppressants like cyclosporine. It also has mild antiplatelet activity that may potentiate the effects of warfarin or aspirin, increasing bleeding risk, and can reduce the oral bioavailability of nadolol and some beta-lactam antibiotics by up to 85% when consumed simultaneously.

### What is the difference between Mao Jian green tea and other Chinese green tea varieties?

Mao Jian is distinguished by its needle-like leaf shape and production in the Xinyang region, which contributes to its unique flavor profile and catechin concentration. Studies show Mao Jian contains comparable or slightly higher EGCG levels (typically 8-12% of dry weight) compared to standard green tea varieties, making it a premium choice for antioxidant potency. The specific terroir and traditional processing methods of Mao Jian enhance both its bioactive compound profile and its antioxidant enzyme activation in animal models.

### Is Mao Jian Green Tea safe for pregnant women and nursing mothers?

While Mao Jian contains caffeine (approximately 20-30 mg per gram of leaf), pregnant women should limit intake to no more than 200 mg total caffeine daily according to standard guidelines. Nursing mothers may safely consume moderate amounts as catechins pass into breast milk in minimal quantities, though individual sensitivity should be considered. It is recommended to consult with a healthcare provider before supplementing with Mao Jian extracts during pregnancy or lactation, as concentrated forms contain higher caffeine levels than brewed tea.

### What does current clinical evidence show about Mao Jian's antioxidant effectiveness in humans?

While most evidence for Mao Jian comes from in vitro and animal studies demonstrating TOSC values of 0.348-0.374/μM and enhanced antioxidant enzyme activity at 125-1250 mg/kg doses, human clinical trials remain limited. Available research confirms that green tea catechins from Mao Jian activate endogenous antioxidant defenses similar to other quality green tea sources, though direct human efficacy data specific to this cultivar is sparse. Large-scale, randomized controlled trials in humans are needed to establish optimal supplementation protocols and quantify health outcomes beyond antioxidant marker improvements.

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