Is it safe to take 400 mg of caffeine at once? A Pharmacological Review
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4 min read
The U.S. Food and Drug Administration (FDA) states that up to 400 mg of caffeine is generally safe for healthy adults to consume *per day*. However, this daily recommendation does not mean **is it safe to take 400 mg of caffeine at once?**, as the rapid consumption of such a high dose can lead to significant and unpleasant side effects.
