Independent supplement ratingsUS and Canada · Updated weekly
A ratings desk for a category that has spent thirty years grading its own homework.
A ratings desk for a category that has spent thirty years grading its own homework.
This category is where supplement scams concentrate. We do not treat, diagnose or promise anything here — we rate products as products: whether the ingredients with any evidence are dosed like the research, and whether the sales practices are clean.
Three ingredients here have human trials worth reading: L-citrulline for blood flow at 3,000–6,000mg a day, maca for self-reported desire at 1,500–3,000mg, and red ginseng for erectile function at around 2,700mg — on trials its own reviewers called too small to settle the question. Every product is scored against the dose printed on its label, against the amount its ingredient was actually studied at.
Prices are checked at publication and re-checked monthly. Where a brand changed its formula and we could not re-verify the new label, we say so rather than guess. Read the full method →