Article: Caffeine breakdown: getting t-t-t-too much of a g-g-g-good thing? Here's how to cut back.

It may enhance alertness, boost physical performance and even help burn fat, but taken excessively, caffeine can bring on a case of the jitters that overwhelms any of its benefits. Everyone has a different level of tolerance, so you need to monitor how your caffeine intake affects your energy level, sleep patterns, and mood. As a general guideline, once a 185-pound man exceeds about 250 to 350 milligrams a day, the cup overflows, and you may encounter such side effects as elevated blood pressure, heartburn, diarrhea, irritability and sleep loss. How do you know if you're over your daily limit? Consult our breakdown, which includes some caffeine sources that may surprise ...

Related newspaper, magazine, and journal articles:

 
 
Newsweek Harper's Magazine The Washington Post Chicago Tribune Crain's Chicago Business PRNewswire Pediatric News The Nation Advertising Age The Economist (US) A FREE trial gives you access to over 80 million articles! Access over 6,500 publications with a FREE trial!