18 common supplements checked against 16 medication classes — the same curated, evidence-tagged rules our members run, signed off by a pharmacology expert. Runs entirely in your browser, no login, nothing stored.
Also free: body composition calculators →
Pick the CLASS your medication belongs to — common examples under each label.
> Pick your supplements, then your medication classes. Verdicts land here instantly.
Every rule is documented pharmacology with an evidence tag. Purely theoretical interactions are held back on purpose — if this tool flags something, there is a reason. It covers interactions with your meds, supplement pairs that fight each other for absorption, and when to take what.
Before you act on any of this
Educational supplement guidance based on documented pharmacology — not a substitute for your pharmacist or prescriber, and not a complete list. Confirm before changing how you take a medication or supplement.
This free checker matches medication classes, not specific products or doses. Members get the full stack builder: type the actual med name, it resolves to the right class automatically, and the whole stack is re-checked every time something changes.