Supplement Tools & Calculators
Free, science-based tools to help you optimize your supplement routine. Calculate dosages, check interactions, compare ingredients, and build custom stacks.
Live Database Tools
Powered by free government APIs — real-time data from NIH, FDA, and USDA.
NIH Supplement Label Search
Search 200,000+ real supplement labels from the NIH Dietary Supplement Label Database. View ingredients, dosages, and label data.
Live APIFDA Safety Reports
Search 53,000+ adverse event reports filed with the FDA about dietary supplements. See reported reactions and safety data.
Live APIUSDA Nutrient Lookup
Look up detailed nutrient profiles for foods and supplements using the USDA FoodData Central database.
Calculators & Analyzers
Offline tools that work entirely in your browser — no data sent anywhere.
Dosage Calculator
Calculate optimal dosages based on body weight, age, and goals
Open toolSupplement Stack Builder
Build custom stacks with interaction checking
Open toolIngredient Comparison
Side-by-side comparison of similar ingredients
Open toolBioavailability Ranker
Compare absorption rates of different supplement forms
Open toolInteraction Checker
Check for supplement-supplement and supplement-drug interactions
Open toolCost Per Serving Calculator
Find the best value supplements by cost per effective dose
Open toolDaily Intake Tracker
Track your daily supplement intake and nutrient totals
Open toolLabel Decoder
Understand every ingredient on a supplement label
Open toolAll tools are completely free to use. No account required. Your data stays in your browser.