Chủ Nhật, 11 tháng 5, 2014
7 Worrisome Facts About Caffeine - weasel coffee
Negative effects aside, there's a reason we use caffeine -- and depend on it. "Caffeine is really powerful and effective for increasing mental acuity and focus," Carpenter says. Research shows it boosts athletic performance as well. However, these positive benefits usually wane the longer we regularly use caffeine. "Most people develop tolerance, so the coffee you drink today will not have the same effect as the first cup you ever had," says Carpenter. But caffeine tolerance differs from that of other drugs in that you can recalibrate it. For example, an alcoholic might quit drinking for years, but if he picks it up again, he'll usually be right back in the problem zone. Not necessarily true for caffeine. "With caffeine, you can reset your baseline pretty quickly if you quit for even a week," Carpenter says. "You'll go through withdrawals, but then when you start on it again, you will notice a bigger boost than you got before you quit."