How long does it take for caffeine to take effect?
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 2.5 to 4.5 hours, which explains why the average energy drink or coffee's effect lasts about 2 to 3 hours.
@askmenow
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 2.5 to 4.5 hours, which explains why the average energy drink or coffee's effect lasts about 2 to 3 hours.
@askmenow
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Thanks for the tip.