Supplement Database

What the star rating means

The score reflects how much research exists and how far along it is — not how safe, effective, or worth taking a supplement is. It is not my personal opinion of how good a supplement is, and not a recommendation. Supplements are labeled “Dietary Supplement” rather than “FDA Approved” because that’s how they’re actually regulated in the US — as food, not as drugs the FDA reviews for safety or effectiveness before sale. A low score means “understudied,” not “bad.” See each profile for the full breakdown.