Are supplements safe?
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Are your supplements worth the money?
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525 products and 2,499 ingredients analyzed against 47,000+ clinical trials. Same databases your doctor uses. No sponsored content.
Most products underdose. We compare against what studies actually use.
Form matters. Magnesium oxide (4%) vs glycinate (80%). We track bioavailability for every ingredient.
59,000+ known interactions checked. Zinc blocks copper. Iron blocks everything. We catch it.
Plain English verdicts. What works, what doesn't, and who it's actually for.
Cross-referenced against 47,000+ clinical trials from PubMed, NIH, and ClinicalTrials.gov
See How They Actually Stack Up
Doctor's Best
High Absorption Magnesium
Citracal
Maximum Plus D3
Centrum
Men's Multivitamin
Carlson
Cod Liver Oil
Ancient Nutrition
Multi Collagen Protein
Airborne
Immune Support Tablets
BulkSupplements
Creatine Monohydrate Powder
Cellucor
C4 Original Pre-Workout
Athletic Greens
AG1
Align
Daily Probiotic
Country Life
Calcium Magnesium Zinc
Double Wood
Fadogia Agrestis Double Wood
Doctor's Best
High Absorption Magnesium
Citracal
Maximum Plus D3
Centrum
Men's Multivitamin
Carlson
Cod Liver Oil
Ancient Nutrition
Multi Collagen Protein
Airborne
Immune Support Tablets
BulkSupplements
Creatine Monohydrate Powder
Cellucor
C4 Original Pre-Workout
Athletic Greens
AG1
Align
Daily Probiotic
Country Life
Calcium Magnesium Zinc
Double Wood
Fadogia Agrestis Double Wood
Every Stack Analysis Includes
Here's what you'll see when you analyze your supplements
Stack Score
Overall rating from 1-10 based on evidence & dosing
Dose Analysis
Are you getting enough? We compare to clinical research
Synergies Found
Which ingredients work better together
Conflict Alerts
Potential interactions and timing issues
Common Questions
Get straight answers to supplement questions. No fluff, just science.
What People Are Saying
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