You’ve seen the listicles. “Top 10 Supplements for Energy!” “Best Vitamins for Gut Health!” They’re all opinions dressed up as advice. We built something different.
Every rating on this site comes from a real meta-analysis of randomized controlled trials. That’s the gold standard in medical research. We pool data from multiple studies, calculate actual effect sizes, and tell you what the numbers say. No guessing. No vibes.
You’ll get a clear verdict for each supplement claim. Does it work? Maybe? No evidence at all? We show you the data behind every answer, including forest plots, confidence intervals, and study counts. If you want to dig deeper, you can. If you just want the bottom line, we’ve got that too.
Browse all supplements to see what we’ve rated so far. Or check out how we rate to understand our process from start to finish.
This isn’t another “top 10” site. It’s a reference tool built on published research. We don’t sell supplements. We don’t take money from brands. We just read the studies so you don’t have to.
Supplements We've Rated
Collagen
Joint pain evidence is solid. Skin benefits look good until you remove industry-funded studies. Gut health claims have …
Creatine
Strong evidence for strength and muscle mass from massive meta-analyses. Emerging evidence for cognition, especially in …
Curcumin
Strong evidence for lowering inflammation markers and relieving joint pain. Comparable to NSAIDs for osteoarthritis with …
Magnesium
Strong evidence for small blood pressure reductions. Modest evidence for sleep. Suggestive for anxiety. Doesn't prevent …
Melatonin
Strong evidence for faster sleep onset and jet lag prevention. Modest evidence for sleep quality. Low doses (0.5-3mg) …
Omega-3 / Fish Oil
Strong evidence for reducing heart disease risk, triglycerides, and inflammation. Moderate evidence for depression, but …
Probiotics
Strong evidence for IBS symptoms across 72+ RCTs. Proven for AAD and C. difficile prevention. Cochrane-backed for …
Vitamin D
Strong evidence for immune function, respiratory infections, and fall prevention at 800-1000 IU daily. Daily dosing may …
Zinc
Strong evidence for immune function and shortening colds. Moderate evidence for acne, especially topical. No real …
Ashwagandha
Strong evidence for anxiety and cortisol reduction. Moderate for strength. Weak for testosterone despite marketing …