Evidence-Based Supplement Reviews
Every claim cited.
We read the studies so you don't have to.
Evidence-based supplement research you can trust. We analyze peer-reviewed clinical studies from PubMed and grade every supplement ingredient on a transparent A–D scale. No sponsored rankings, no manufacturer influence — just science.
Evidence Grading System
Every supplement claim on this site is graded on an A–D scale based on peer-reviewed clinical research from PubMed. Our algorithm evaluates study design (RCTs rank highest), consistency of results, sample sizes, and the overall body of evidence. No manufacturer sponsorship influences our grades.
Multiple randomized controlled trials (RCTs) or meta-analyses with consistent positive results and large sample sizes.
At least one RCT with mostly consistent results across studies. Evidence suggests benefit but more research may be needed.
Small studies or observational data with some positive signals. Promising but insufficient for strong recommendations.
In vitro studies, case reports, or pilot studies only. Early-stage research that requires clinical validation.
How It Works
No ads. No sponsored rankings. Just science.
Search PubMed
We search PubMed for every clinical study on supplement ingredients.
Extract Findings
We extract the key findings — sample sizes, study types, and results.
Grade A through F
We grade the evidence like a school report card — from A (strong) to F (negative).
Clear Answer
You get a clear answer in seconds — does this supplement actually work?
Cited Health Network
Explore evidence-based research across multiple health domains.
Evidence-based hair supplement reviews. Every claim backed by peer-reviewed rese
SleepCitedEvidence-based sleep supplement reviews. Every claim backed by peer-reviewed res
GutCitedEvidence-based gut health supplement reviews. Every claim about probiotics, preb
ImmuneCitedEvidence-based immune supplement reviews. Every claim about vitamin C, zinc, eld
BrainCitedEvidence-based brain and cognitive supplement reviews. Every claim about nootrop
WeightCitedEvidence-based weight management supplement reviews. Every claim about green tea
HeartCitedEvidence-based cardiovascular supplement reviews. Every claim about omega-3, CoQ
SkinCitedEvidence-based skin health supplement reviews. Every claim about collagen, vitam
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.