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Kaffine Half Life
Kaffine has a half life of about six or seven hours. If you have a cup of coffee at noon, a quarter of that kaffine is still circulating round your brain at midnight. It does which delays the deep sleep onset and it prevents deep sleep. And i'm just an i sleep like nthere aute man. You would have to age a human being by abouta 20 to 30 years to produce a 20 % reduction in deep sleep.