What is in your system right now?

Search any medicine, vitamin, supplement or peptide to see how long it stays in you, what it does, its side effects, and what people are saying about it. Sign in to log what you take (snap a photo of the label) and watch your own live clocks.

Try one

Caffeine Ibuprofen Melatonin Loratadine Loperamide Semaglutide Alcohol BPC-157 Amphetamine salts Diphenhydramine

How it works

Every substance has a half-life: the time for half of it to leave your blood. After about five half-lives it is under 3% and counted as gone. Some things keep working after they have left the blood (acid blockers, aspirin), and some act locally and never really enter the blood (antacids, laxatives). You log a time and a quantity; the clock and the graph do the rest, and doses taken close together add up.

Private by design

Your log is stored encrypted at rest and tied to your account. We may use aggregated, de-identified data (never your name, phone, email or individual entries) for research and commercial purposes. Sign in with a one-time code to your phone or email. Privacy policy.