Caffeine is a popular pick-me-up found in coffee, tea, energy drinks, and even chocolate. While it can sharpen focus and boost energy, too much caffeine can do more harm than good. Overconsumption can ...
Drinking too much caffeine can show up as fatigue, jitters, headaches, heart palpitations, and more. Experts recommend capping your caffeine intake at 400 milligrams a day. If you spot these warning ...