01
Paraxanthine
The primary metabolite of caffeine. When your liver breaks caffeine down, about 80% of it becomes paraxanthine. Relm gives it to you directly, with no conversion step. With a half-life of roughly 3.1 hours versus caffeine’s 4.1, it works when you need it and clears out on schedule, so the energy is there when you want it and not when you don’t. In a double-blind, placebo-controlled trial, 50 mg of paraxanthine improved reaction time and sustained attention, with no significant side effects over a week of daily use.