Independent Supplement Quality Grades
Every supplement graded on purity, dosage safety, bioavailability, and third-party testing. 252 products across 8 categories — scored using NIH, USP, and peer-reviewed research. No paid placements.
Browse by Category
Each category graded by overall quality — factoring in purity, dosage safety, and third-party testing.
Top Graded Supplements
Highest overall quality grades across all categories.
Ritual Vitamin K2 100mcg
Ritual
Nordic Naturals Women's Probiotic 50B CFU
Nordic Naturals
MegaFood Ginger Root 250mg
MegaFood
Life Extension Plant Protein Blend 20g/serving
Life Extension
Pure Encapsulations Vitamin C 2000mg
Pure Encapsulations
Thorne Folate 1000mcg
Thorne
Ingredient Guides
Evidence-based profiles: dosage, safety, best forms, and interactions.
Vitamin D3 (Cholecalciferol)
Vitamin D3 is the most bioavailable form of vitamin D, produced naturally in the skin upon sun expos...
Magnesium
Magnesium is involved in over 300 enzymatic reactions in the body. It supports muscle and nerve func...
Omega-3 Fatty Acids (EPA/DHA)
Omega-3 fatty acids EPA and DHA are essential fats that the body cannot produce on its own. They are...
Probiotics
Probiotics are live beneficial bacteria that support gut health, immune function, and nutrient absor...
Ashwagandha (Withania somnifera)
Ashwagandha is an adaptogenic herb used in Ayurvedic medicine for over 3,000 years. It's primarily u...
Zinc
Zinc is an essential trace mineral involved in immune function, protein synthesis, wound healing, an...
Transparent, Evidence-Based Grading
Every grade is calculated using a documented methodology based on purity, dosage safety, bioavailability, third-party testing, and allergen safety. No paid placements.