Supplement label check
What is in the tub, and does it fight your medicine?
Look up any US supplement in the National Institutes of Health label database, see every ingredient it actually contains, and check each one against the medicines you take. Free, no account, and where something clashes we name a gentler herb instead.
1. What medicines do you take?
Brand or generic. A brand name is matched to its generic ingredient through the US National Library of Medicine. Only the name is sent, nothing else, and nothing is stored.
2. Which supplement?
Type the product or brand name from the front of the bottle.
How this check is calculated
- What this check shows
- The ingredient list printed on a real US supplement label, read from the National Institutes of Health database, with each ingredient checked against the medicines you entered.
- What it uses
- The NIH Dietary Supplement Label Database for the product, the US National Library of Medicine for turning a brand-name medicine into its generic ingredient, and our own curated interaction table for the check itself.
- How it is weighted
- There is no score. Each ingredient is reported on its own, with the severity taken from our interaction table and the reason stated in full. A product is not graded, because there is no agreed way to grade one and inventing a number would imply an accuracy we cannot support.
- What it is NOT
- It is not a clinical medication review, and it cannot see doses, your kidney or liver function, or anything else your pharmacist would weigh. Our interaction table covers eighteen herbs in depth — an ingredient outside it is reported as 'no data', which is not the same as safe.
Why these factors
- Label data comes from the NIH Office of Dietary Supplements, which holds the printed labels of over 200,000 US products.
- Brand-to-generic resolution uses RxNorm from the US National Library of Medicine.
- This does not scan barcodes. The NIH database records a product barcode but does not let anyone search by one, so a scan could not find your product reliably — and we would rather have a search box that works than a camera that does not.
Educational information, not medical advice, and not a substitute for a pharmacist. Supplement labels change; always read the bottle in your hand. Never stop a prescribed medicine because of anything here.