Educational dose math only — not medical advice, not a product recommendation, and not a pass/fail on whether a supplement will work for you.
0 100% 150%+

—

Enter label dose

Trial reference

From your label

Per-day total — not per serving unless you take one serving

Enter your label dose — the gauge updates instantly.

15 weight-loss trials. Small, statistically non-significant pooled effect; authors concluded not clinically important. Outside Japan MD −0.04 kg (95% CI −0.5 to 0.4).

Educational only — not medical advice. Disclaimer.

NIH DSLD market slice

Median100 mg
Products5,240
Below96%

Bulk CSV dump 16 January 2026 · label entries through 2025. Disclosed amounts only — proprietary blends without gram weights excluded.

Trial floors

Primary

Cochrane weight-loss review · 800 mg over 12-13 weeks (medium evidence) · Primary endpoint missed — 15 weight-loss trials. Small, statistically non-significant pooled effect; authors concluded not clinically important. Outside Japan MD −0.04 kg (95% CI −0.5 to 0.4).

Secondary

Dose-response meta (Lin 2020) · 800 mg over 8-12 weeks (medium evidence) · Secondary outcomes only — Pooled −1.78 kg (95% CI −2.80 to −0.75). Waist reduction greater at ≥800 mg/day green tea preparations and duration <12 weeks. Heterogeneous extract types; part of effect is caffeine.

Label reading notes

  • Lin meta used green tea preparation mg/day; EGCG-specific labels may not match extract totals in trials.
  • Cochrane verdict: not clinically important; shelf math is not a weight-loss promise.
  • Decaffeinated extracts show weaker or absent effects; thermogenic products often add 300–600 mg caffeine.
  • FDA warnings on green tea extract and idiosyncratic hepatotoxicity at high doses or with fasting.