diet coke caffeine vs coffee?Advertisement
Caffeine might be a natural substance -- it occurs in more than 60 plants -- but it certainly has side effects that could be less than pleasing to some. According to the U.S. Food and Drug Administration, caffeine can cause you to feel jittery, increase your heart rate, raise your ... - read more
Find out just how much caffeine is in your cup of coffee or glass of soda. And check out the caffeine content in popular energy drinks. - read more
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