I’m guessing this is assuming that caffeine and paraxanthine both have a half life of 5 hours, and that all caffeine is converted into paraxanthine. My simulator by default uses 4 hours for paraxanthine and 5 hours for caffeine, and a ratio of 0.84 for caffeine → paraxanthine.
I’m guessing this is assuming that caffeine and paraxanthine both have a half life of 5 hours, and that all caffeine is converted into paraxanthine. My simulator by default uses 4 hours for paraxanthine and 5 hours for caffeine, and a ratio of 0.84 for caffeine → paraxanthine.