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Promising · 6.4/10

Fucoidan (Brown Seaweed Polysaccharide)

Evidence D · early evidence ▲ 22.9% momentum 🥇 First scout open
6.4/ 10

Fucoidan is a sulfated polysaccharide from brown seaweed scored 6.4 out of 10 (worth trying). Its strongest human signal is immune support, where Negishi 2013 showed higher influenza-vaccine antibody titers in adults over 60 at 300 mg per day, but most fucoidan evidence remains preclinical. Read the full breakdown →

The prediction game

Where does Fucoidan (Brown Seaweed Polysaccharide) go in 12 months?

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The Crowd’s Call

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Your 12-month call on Fucoidan (Brown Seaweed Polysaccharide)

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Ring Promising Momentum 22.9% Updated Jul 20, 2026 How the Index ranks →

Verdict by Nick Urban, host of the High Performance Longevity podcast.

For education only, not medical advice. Supplements, peptides, and protocols can interact with medications and conditions. Talk to a qualified clinician before starting anything here.