We don't sell supplements.
We score them.
Independent reviews scoring 1441+ products on clinical evidence, third-party testing, cost per effective dose, and label transparency.
We earn affiliate commissions when you buy through our links. The rubric is deterministic, so a product's score is the same whether the brand pays us or not.
How we score →Strongest Evidence
Supplements ranked by the strength of their clinical research. How we rate evidence →
Highest Scored Products
View all →Top-scoring individual products across all supplement categories
Recently Scored
All supplements →Nature Made Selenium 200 mcg
Nature Made
Kirkland Signature Vitamin D3 50 mcg (2000 IU)
Kirkland Signature
Psyllium Whole Husks
Yerba Prima
Ovasitol Inositol Powder, 90-Day Supply (Canister)
Theralogix
Ovasitol Inositol Powder, 90-Day Supply (Myo + D-Chiro 40:1)
Theralogix
Ovasitol Inositol Powder, 90-Day Supply (40:1 Myo + DCI)
Theralogix
Naked Casein
Naked Nutrition
Nature Made Iron 65mg (Ferrous Sulfate)
Nature Made
How We Score
Full methodology →Every supplement gets two independent scores: an evidence tier for the ingredient, and an execution score for each product brand.
Evidence Rating
Grades the clinical evidence for an ingredient type - independent of any brand. Assigned per meta-analysis and systematic review data.
Multiple large RCTs and meta-analyses confirm benefit
Several RCTs showing benefit, generally consistent results
Limited RCTs or mixed results across studies
Mostly animal or in-vitro studies; human data weak
No meaningful evidence, or evidence shows no benefit
Execution Score /100
Grades each product brand on four equally-weighted pillars. A high-evidence ingredient can still be sold in a poorly-executed product.