Free Supplement Tools

Free, no-signup tools for checking what you take: interactions with your medication, the evidence behind each supplement, your total intake against NIH upper limits, and what a stack costs per day. Educational only, not medical advice.

Safety check
Supplement and Medication Interaction Checker
Check any supplement against your medication. Each interaction is rated major, moderate or minor and quoted from NIH ODS or NCCIH.
Evidence database
Supplement Evidence Database
60+ supplements with clinical study counts, proven versus unproven claims, dosages and interactions. Compare side by side.
Safety check
Supplement Stack Auditor
Enter every supplement you take. It sums each nutrient across your products and flags any that exceed the NIH tolerable upper intake level.
Cost planner
Supplement Stack Calculator
Pick your supplements and see the daily cost for affordable and premium options, with a timing schedule and overlap warnings.
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