For many other people, caffeine is something of a mystery. Studies — and there are scads of them — sometimes contradict each other. Products containing caffeine use positive words like “energy” and ...

Suddenly stopping caffeine can cause the brain to go into withdrawal. This happens because caffeine temporarily block receptors, and then when the caffeine is stopped, the brain releases too much of ...

Dr. Rohit Vuppuluri, an interventional cardiologist, tells Yahoo Life that caffeine is safe to use in moderation — less than 400 mg per day, according to the Food and Drug Administration (FDA), which ...

When your energy stores are running low (like, really low), stretching out that much-needed caffeine buzz from your morning cuppa is a non-negotiable. This is even more imperative if having more than ...

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