Add Yahoo as a preferred source to see more of our stories on Google. For most healthy adults, consuming up to 400mg of caffeine a day is considered safe - Getty According to Nichola Ludlam-Raine, a ...

This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in ...

Learn how caffeine affects brain chemicals and health, sleep, and mood. Understand safe daily limits, hidden sources, and signs you’re getting too much.

Fresh coffee as soon as I step out of bed. A second cup during a mid-morning meeting. A 3 p.m. afternoon pick-me-up. I’m not alone when I say caffeine sets the pace of my day: Over 90 percent of ...

Plus, how to find your caffeine sweet spot.

Between Celsius, Prime, and Red Bull, talk of highly caffeinated drinks is everywhere, and not always for good reasons. Prime Energy contains 140mg of caffeine per 250ml can. That's nearly twice as ...