Rhonda Patrick· PhD
Just 200 mg of caffeine (one large cup of coffee) within 3 hours of bedtime disrupts sleep by shifting your brain into a more chaotic, wake-like state.
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We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
Just 200 mg of caffeine (one large cup of coffee) within 3 hours of bedtime disrupts sleep by shifting your brain into a more chaotic, wake-like state.
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