
Caffeine seems to be safe for most people, at least up to the amount you’d get from four cups of brewed coffee a day. But that much could make you anxious, disrupt your sleep, or get your pulse racing.

Caffeine seems to be safe for most people, at least up to the amount you’d get from four cups of brewed coffee a day. But that much could make you anxious, disrupt your sleep, or get your pulse racing.