Green tea / EGCG
Full ranking Dose tool Products (1,324)
Key facts
Sources: https://doi.org/10.2903/j.efsa.2018.5239 · EFSA ANS 2018: >=800 mg EGCG/day from supplements raised serum transaminases; Health Canada: max 690 mg catechins incl. 300 mg EGCG/day. Label mass is extract, not EGCG, so no soft flag; hard = 10x the ~1 g extract that delivers ~800 mg EGCG
Daily dose across products (mg/day)
Label data from official national databases and brand websites, as declared; not lab-verified.
Common questions
How much Green tea / EGCG do products usually contain per day?
As of 2026-11-01, 1,324 products list a comparable daily dose (1,449 dose records; one product can have several). The median is 100 mg per day, and 90% of records fall between 14.8 and 725 mg. Figures come from labels and are not lab-tested. [source]
What are the side effects of Green tea / EGCG?
No safety concerns have been reported for green tea as a beverage in adults, though it contains caffeine. Side effects of green tea extract supplements include nausea, constipation, abdominal discomfort and increased blood pressure. (Source: NCCIH) [source]
What happens if you take too much Green tea / EGCG?
Liver injury, though uncommon, has been reported with green tea products, mainly extract tablets or capsules. People with a certain immune-related gene variant (5–15% of Americans) appear especially susceptible. (Source: NCCIH) [source]
Is Green tea / EGCG safe during pregnancy and breastfeeding?
Caffeine in pregnancy should stay moderate, and green tea contains caffeine; ask your provider. Caffeine passes into breast milk, and high intake can make infants fussy and sleep poorly; low-to-moderate intake usually causes no problems. (Source: NCCIH) [source]
Does Green tea / EGCG interact with medications or other supplements?
High-dose green tea lowers blood levels of the beta-blocker nadolol; green tea extract lowers levels of atorvastatin; green tea also interacts with raloxifene and may interact with other medicines. (Source: NCCIH) [source]
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Nature's Sunshine | Green Tea | 1,260 mg | 100.0 |
| 1 | Applied Nutrition | Green Tea & Carb Blocker | 600 mg | 100.0 |
| 1 | Nature's Bounty | Green Tea 315 mg | 1,260 mg | 100.0 |
| 1 | XYMOGEN | Green Tea 600 | 600 mg | 100.0 |
| 1 | Nature's Bounty | Green Tea Extract | 1,260 mg | 100.0 |