a coffee myth ・ metabolite kinetics
Your coffee outlives your coffee.
Caffeine doesn't just wear off — your liver turns most of it into paraxanthine, which is itself a stimulant, and clears on its own slower clock. So hours after the coffee is "gone," something it became is still keeping you up. Drag the clock to when you had it.
caffeineparaxanthine — what it becomes
7:00 AM
drag the hand — when did you have your coffee?
This is Piru's real metabolite model — it tracks not just what you took, but what your body turns it into. Most trackers stop at the parent drug. See what Piru tracks for what you take →
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