Nootropic · label-based rating
Prevagen
by Quincy Bioscience · $47.99 / 30 servings ($1.60/serving)
✕ Skip it — the formula fails regardless of price
"The #1 pharmacist-recommended memory brand." Apoaequorin from jellyfish.
Key ingredients
Apoaequorin · Vitamin D
Doses are hidden or too numerous to grade one-by-one — this product carries a label-based rating.
The verdict
Prevagen's active is apoaequorin, a protein your stomach digests like any other — the mechanism doesn't survive first contact with your gut. The FTC and New York AG sued over its efficacy claims. There's no clinical dose to hit because there's no credible effect. Nothing to rebuild; this is the one to avoid.
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Educational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.