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Monday, June 4, 2018

How long does caffeine last in your system? Metabolism, sleep, and withdrawal

Bear in mind that the half-life given for many products may assume each person is a "standard metabolizer" which typically encompasses 70% of the population. That means up to 30% may be outliers. If you are sensitive to caffeine, even small doses may have persisting effects into the night and affect sleep. Also, consider if you are indirectly using caffeine as a medication for some unrecognized symptoms. Not uncommonly I see patients who claim they have no daytime sleepiness yet they consume 4-8 caffeinated products a day. The salient question is what would happen if one were not consuming such high doses of caffeine.
from Rajesh Harrykissoon, MD

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