Evidence-graded · Independent · Updated continuously

Supplements, graded by the evidence.

We translate the scientific literature into clear evidence ratings, surface what trusted experts actually say, and point you to brands that are tested and fairly priced.

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Our evidence scale

Methodology →
Strong evidence

Multiple high-quality RCTs and meta-analyses converge on a clear effect.

Moderate evidence

Reasonable RCT or meta-analytic support, with some inconsistency or limitations.

Limited evidence

Mostly small trials, observational data, or mechanistic reasoning.

Insufficient evidence

Claims outpace the data; primarily preclinical or anecdotal support.

Best-supported supplements

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