1 shouldn't hurt you. They say it has as much caffeine as a cup of coffee, which I believe is around 90 mg. How much caffeine did you have prior to the 5 hour energy? The symptoms of an over dose of caffeine are racing heart, nervousness, being really jittery. It impacts the CNS.
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Thread: 5 Hour Energy
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07-21-2012, 01:51 PM #4