Supplement index
All supplements
Evidence grades, third-party certifications, and published lab tests for every supplement vertical we track. Independent. We do not run the tests.
Key Takeaways
- NutraTested tracks third-party certifications (NSF, USP, Informed Sport) and published lab tests across all supplement verticals.
- Evidence grades (A to D) reflect the weight of current clinical literature for each stated use, not a claim about any single product.
- We do not run any tests. All certifications and lab results are aggregated from public registries and published sources, attributed.
- Affiliate links appear only on products with an active third-party certification or passing test result. Grade and ranking cannot be purchased.
Tracked verticals
Supplement pages
Each page covers certifications, published lab tests, evidence grades by use, and expert stacks. Click a supplement to see the full record.
Creatine Monohydrate
Among the most robustly supported supplements for muscle strength and lean mass across age groups.
Omega-3 (Fish Oil)
Omega-3 fatty acids (EPA and DHA) have strong, consistent evidence for lowering fasting triglycerides, an effect recognized by the FDA through
Protein Powder
The evidence that protein supplementation supports muscle gain with resistance training is among the most robust in nutrition science: a 2018 meta-analysis of
Magnesium
Magnesium evidence quality varies sharply by use case and by form.
Vitamin D
Vitamin D supplementation is strongly supported for deficiency correction: supplemental D3 reliably raises serum 25(OH)D in deficient individuals, with roughly
Electrolytes
This is the weakest and most commercially conflicted vertical in the NutraTested coverage set.