how long does caffeine take to work
It only takes 45 minutes for 99% of the caffeine to be absorbed through these membranes. In humans, the half-life for caffeine is anywhere from 4 to 6 hours on average, which explains why the average energy drink or coffeeâs effect lasts about 4 to 6 hours. Things like age, medical conditions, and drug interaction can have an effect on the half-life.