How A lot Caffeine You Ought to Really Have—and When

Caffeine can provide us a lift, however an excessive amount of can mess with our sleep and make us really feel jittery. So how do we all know what’s the correct quantity?

Typically, authorities and well being teams suggest that wholesome adults eat not more than 400 milligrams of caffeine a day. That comes out to about 4, 8-ounce cups of espresso, says Jennifer Temple, a professor of train and vitamin sciences at College at Buffalo Faculty of Public Well being and Well being Professions.