Methodology
The supplement industry runs on confident claims and weak data. Evidently exists to do the opposite: rate each supplement against the actual scientific literature, surface what trustworthy experts say, and point to brands that have earned it.
How we grade evidence
Every supplement gets one of four ratings, prioritising randomised controlled trials, meta-analyses, and rigorous independent reviews (e.g. Cochrane, Examine).
Multiple high-quality RCTs and meta-analyses converge on a clear effect.
Reasonable RCT or meta-analytic support, with some inconsistency or limitations.
Mostly small trials, observational data, or mechanistic reasoning.
Claims outpace the data; primarily preclinical or anecdotal support.
How we choose experts
We deliberately mix mainstream evidence-based communicators (Attia, Patrick, Huberman, Galpin, Examine.com) with respected skeptics (Layne Norton, Nick Tiller, Stuart Phillips, Kevin Bass). Both perspectives matter — popular experts often surface useful tools, while critics keep the field honest about effect sizes and study quality.
How we choose brands
We weight three things: independent third-party testing (NSF, USP, IFOS, public CoAs), formulation quality (clinically-used forms and doses, no megadosing or junk fillers), and fair pricing. We recommend across budget, moderate, and premium tiers — high price doesn't equal high quality.
Important
Evidently is educational. Nothing here is medical advice. Speak with a qualified clinician before starting, stopping, or combining any supplement — especially if you have a medical condition or take prescription medication.