Privacy, terms & disclosures

This tool does not replace medical diagnosis or treatment. It provides information based on published research. Talk to your doctor or pharmacist before changing supplements, especially if you take medication, are pregnant, or have a health condition.

Nothing on this site is a diagnosis, prescription or recommendation to start, stop or change any medication or supplement. If you think you are having a medical emergency, contact emergency services.

The checker runs entirely in your browser. The supplements, doses, medications and conditions you select are stored only in your browser's local storage and in the page URL when you choose to share it. We do not operate a server that receives this information.

We may use privacy-friendly, cookieless analytics to count page views. Clearing your browser storage removes your saved stack.

Some product links may be affiliate links, including as an Amazon Associate. If you buy through them we may earn a commission at no extra cost to you. Commissions never influence interaction ratings, evidence levels or schedules, which are generated from the same public dataset for everyone.