About Fucoxanthin
A carotenoid from brown seaweed (e.g. wakame). The most-cited human weight-loss trial used Xanthigen, a fucoxanthin + pomegranate-seed-oil combination, so the effect cannot be attributed to fucoxanthin alone; remaining data are animal/mechanistic (thermogenesis via UCP1). Standalone human evidence is insufficient.
What Fucoxanthin supports
- Seaweed carotenoid; a combination-product trial hinted at fat loss, not proven alone
How much Fucoxanthin to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
1–5
mg
The main weight-management RCT delivered ~2.4 mg fucoxanthin/day (within the Xanthigen combination).
Clinical evidence
Limited clinical evidence. One combination-product RCT plus animal data; not isolable.
NIH Fact Sheet