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Caffeine begins to affect your body very quickly. It reaches a peak level in your blood within 30 to 60 minutes. It has a half-life of 3 to 5 hours. The half-life is the time it takes for your body to eliminate half of the drug. The remaining caffeine can stay in your body for a long time. Effects can last from 8 to 14 hours
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoVery rapidly.
Caffeine from beverages, take only 10-15 minutes to metabolize and cross the blood brain barrier, and take effect.
Peak caffeine blood levels, occur about 30-45 minutes after consumption. And, can last from about 4 - 9 hours, highly dependent on the person; how sensitive they are to caffeine, the dose level, the person's metabolism, etc.
The amount of time it takes for the caffeine to "wear off" or "crash" from varies greatly person to person. It has anywhere from a 4-9 hour half-life.
Half-Life = the amount of time it takes for HALF of the drug to be eliminated from your body.
Wiki User
∙ 9y agoThe effects of caffeine last 8-14 hours in the body.
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Hi, it`s difficult to say. There are few articles which show stimulating effect of caffeine on locomotor activity of Drosophila. But in this case caffeine was given with food by long time. In other article you can find suggestion that acute treatment of caffeine gives inhibition effect, chronic treatment gives stimulating effect. I work on crickets and caffeine and my research shows something like this. After injections (acute treatment) I observe decrease of locomotor activity. Now I`m working on effects of caffeine after treatment with food. We will see what happen. I don`t know anything about other effects . Jacek monty18@wp.pl
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