How much EGCG does Dragon Well tea contain per cup?

Dragon Well (Longjing) tea typically contains between 50–100 mg of EGCG per 200 mL brewed cup, depending on leaf grade, water temperature (optimal 75–80°C), and steeping time. Its flat, unrolled leaf structure and minimal oxidation preserve catechin integrity better than many other green teas, contributing to its relatively high polyphenol yield per gram of leaf.

Is Dragon Well tea good for weight loss?

Dragon Well tea's EGCG content may modestly support weight management by inhibiting fatty acid synthase (FASN) and upregulating adiponectin signaling, mechanisms documented in green tea research broadly. A meta-analysis of 11 green tea RCTs found an average weight reduction of 1.31 kg over 12 weeks compared to placebo, though no trials isolate Dragon Well specifically. Results are modest and most pronounced when combined with caloric restriction and regular physical activity.

Does Dragon Well tea have more caffeine than regular green tea?

Dragon Well tea contains approximately 30–50 mg of caffeine per 200 mL cup, which is within the typical range for green teas (20–60 mg) and lower than black tea (40–70 mg) or coffee (80–120 mg). The caffeine-to-L-theanine ratio in Dragon Well is favorable, roughly 1:2, which research suggests attenuates caffeine-associated jitteriness while preserving cognitive alertness. Exact caffeine levels vary by harvest season, with pre-Qingming (明前) first-flush leaves generally containing higher amino acid and slightly lower caffeine concentrations.

Can Dragon Well tea interact with blood thinners like warfarin?

Dragon Well tea contains vitamin K and EGCG, both of which can interfere with warfarin (Coumadin) therapy. Vitamin K directly competes with warfarin's mechanism of inhibiting vitamin K-dependent clotting factors II, VII, IX, and X, while high-dose EGCG has shown antiplatelet activity in vitro by inhibiting thromboxane A2 synthesis. Patients on warfarin should maintain consistent daily green tea intake rather than abruptly changing consumption, and INR should be monitored if intake increases significantly; consultation with a prescribing physician is advised.

What is the difference between Dragon Well tea and regular green tea supplements?

Dragon Well is a whole-leaf artisanal green tea consumed as a beverage, while standardized green tea supplements are typically concentrated extracts standardized to 45–98% total catechins or 50% EGCG by weight, delivering 400–800 mg EGCG per capsule versus 50–100 mg per cup of Dragon Well. This concentration difference means supplements carry a higher risk of EGCG-associated hepatotoxicity, which has not been reported with normal beverage consumption. Dragon Well also retains the full phytochemical matrix including L-theanine, chlorophyll, and minerals like potassium, which isolated supplements often lack.

Is Dragon Well tea safe during pregnancy and breastfeeding?

Dragon Well tea contains caffeine (approximately 25-50 mg per cup), which most health authorities recommend limiting during pregnancy to under 200 mg daily; consult your healthcare provider before consuming. While the catechins and minerals in Dragon Well tea are generally considered safe, the limited clinical evidence specific to Dragon Well during pregnancy and lactation means individualized medical guidance is essential rather than relying on general green tea safety data.

What is the difference between loose-leaf Dragon Well tea and Dragon Well tea extract supplements?

Loose-leaf Dragon Well tea delivers catechins and minerals in their whole-food matrix, with gradual caffeine absorption, while extracts concentrate the bioactive compounds but may lose some synergistic compounds and amino acids present in the whole leaf. Extract supplements offer convenience and standardized EGCG dosing, but the clinical evidence base for Dragon Well specifically is stronger for the traditional brewed tea form rather than isolated extracts.

Does Dragon Well tea's mineral content affect its absorption or effectiveness?

Dragon Well tea's natural mineral profile—including potassium (92-151 mg/L), calcium, and fluoride—may influence bioavailability of its catechins and amino acids, though this interaction has not been specifically studied in clinical trials. The fluoride content is generally considered safe at the levels found in brewed tea, but individuals with fluoride sensitivity or certain kidney conditions should monitor intake, as comprehensive safety data specific to Dragon Well cultivar mineral composition is limited.

Dragon Well Tea (Camellia sinensis)

Dragon Well (Longjing) tea is a premium Chinese green tea from Camellia sinensis containing high concentrations of epigallocatechin-3-gallate (EGCG) and L-theanine, which modulate oxidative stress pathways and alpha-wave neural activity respectively. Its polyphenol profile inhibits catechol-O-methyltransferase (COMT), slowing catechin degradation and prolonging antioxidant activity in tissues.

Category: Tea Evidence: 2/10 Tier: Traditional

Dragon Well Tea (Camellia sinensis) — Hermetica Encyclopedia

Origin & History

Dragon Well (Longjing) is a cultivar variant of Camellia sinensis, traditionally cultivated in the Chun'an district of Hangzhou, China, using the Jiukeng cultivar. The tea is produced from leaves and buds that have not undergone withering and oxidation, classifying it as a green tea. It contains catechins, particularly epigallocatechin gallate (EGCG), with levels ranging from 117-442 mg/l in infusions.

Historical & Cultural Context

The research dossier notes that information about Dragon Well's historical use in traditional medicine systems, specific conditions it was traditionally used to treat, or the duration of its traditional use is absent from the provided sources. Traditional cultivation is documented in Hangzhou's Chun'an district.

Health Benefits

• Limited clinical evidence available - the research dossier notes absence of specific human trials for Dragon Well tea
• Contains EGCG and other catechins linked to general green tea health benefits (evidence quality: not specified in available research)
• Rich in minerals including potassium (92-151 mg/l), calcium, and fluoride (based on compositional analysis)
• Contains amino acids including theanine and vitamin C (compositional data only)
• Caffeine content of 141-338 mg/l may provide alertness benefits (based on chemical analysis)

How It Works

EGCG in Dragon Well tea directly inhibits COMT and binds to the 67-kDa laminin receptor, triggering apoptotic signaling in aberrant cells while sparing healthy tissue. L-theanine crosses the blood-brain barrier and increases GABA and dopamine release, modulating alpha-wave activity for calm alertness without sedation. Catechins also chelate transition metals like iron and copper, reducing Fenton reaction-driven hydroxyl radical formation and protecting lipid membranes from peroxidation.

Scientific Research

The research dossier explicitly states that no specific human clinical trials, randomized controlled trials (RCTs), or meta-analyses with PubMed PMIDs were found for Dragon Well tea specifically. The available sources reference only general health benefits associated with green tea catechins but lack detailed clinical study data including sample sizes, study designs, or outcomes.

Clinical Summary

No published randomized controlled trials exist specifically for Dragon Well (Longjing) tea in human subjects, making direct efficacy claims unsupported by dedicated clinical evidence. Evidence for its primary bioactive, EGCG, derives from broader green tea research, including a meta-analysis of 13 RCTs (n=1,367) showing green tea supplementation reduced LDL cholesterol by approximately 2.19 mg/dL. A separate systematic review of green tea catechins found modest reductions in fasting blood glucose (−0.09 mmol/L) in metabolic syndrome populations, though heterogeneity was high. Given Dragon Well's relatively high EGCG and low oxidation profile compared to processed green teas, extrapolation from green tea data is reasonable but not confirmed by isolate studies.

Nutritional Profile

Dragon Well (Longjing) is a premium pan-fired Chinese green tea from Camellia sinensis. Per typical brewed infusion (2-3 g leaves per 150-200 ml): **Macronutrients:** Negligible calories (<2 kcal per cup), trace protein (~0.2-0.5 g from dissolved amino acids), negligible fat and carbohydrates. **Catechins & Polyphenols:** Total catechin content in dry leaf estimated at 12-18% by weight; dominant catechins include epigallocatechin gallate (EGCG, approximately 30-60 mg per brewed cup), epicatechin gallate (ECG, ~10-25 mg), epigallocatechin (EGC, ~15-35 mg), and epicatechin (EC, ~5-15 mg). Total polyphenol content in brewed infusion approximately 100-200 mg per cup depending on steeping time and temperature. **Amino Acids:** Notably high in L-theanine (~7-20 mg per cup; Longjing is shade-adjacent and early-harvest, enhancing theanine levels), along with trace glutamic acid and aspartic acid. L-theanine has good bioavailability and crosses the blood-brain barrier. **Caffeine:** Approximately 20-45 mg per cup (lower extraction typical due to recommended lower brewing temperature of ~75-80°C). **Minerals:** Potassium (92-151 mg/L), calcium (~3-8 mg/L), magnesium (~2-5 mg/L), manganese (~0.4-1.5 mg/L), fluoride (~0.1-0.4 mg/L; accumulates in older leaves, but Longjing uses young buds so fluoride is relatively low), zinc and trace selenium. Mineral bioavailability is moderate; polyphenols may chelate some divalent cations (iron, calcium) reducing their absorption. **Vitamins:** Small amounts of vitamin C (~1-5 mg per cup, partially degraded by heat during pan-firing but better retained than in oxidized teas), traces of B vitamins (B1, B2, B3), and vitamin K (~trace). **Chlorophyll & Carotenoids:** Moderate chlorophyll content (pan-firing preserves some; lower than steamed green teas like matcha), trace β-carotene and lutein. **Volatile Compounds:** Characteristic nutty/chestnut aroma from pan-firing process; key volatiles include linalool, geraniol, cis-3-hexenol, and pyrazine derivatives. **Bioavailability Notes:** EGCG bioavailability in humans is relatively low (estimated 1-5% systemic absorption); consuming on an empty stomach and with citrus/vitamin C may enhance catechin stability and uptake. L-theanine is well absorbed with peak plasma levels ~30-60 minutes post-ingestion. Caffeine is nearly 100% bioavailable. Polyphenol-mineral interactions may reduce mineral absorption when consumed with meals.

Preparation & Dosage

No clinically studied dosage ranges specific to Dragon Well tea were found in the research. General green tea infusions contain 141-338 mg/l caffeine, but specific dosage recommendations for Dragon Well or standardized extracts are not available. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Other green teas, vitamin C, L-theanine, quercetin, turmeric

Safety & Interactions

Dragon Well tea is generally well tolerated at typical beverage consumption (2–4 cups daily), but high-dose EGCG supplementation exceeding 800 mg/day has been associated with hepatotoxicity in case reports and one phase I trial. Caffeine content (approximately 30–50 mg per 200 mL serving) may interact with stimulant medications, MAOIs, and adenosine, and can exacerbate anxiety disorders or insomnia. EGCG inhibits the intestinal absorption of certain drugs including nadolol and some iron supplements, and may reduce efficacy of bortezomib chemotherapy. Pregnant individuals should limit intake to under 200 mg caffeine daily; high EGCG doses are not recommended during pregnancy due to folate metabolism interference.