That jittery feeling is a sign to change course, not panic. Drinking too much coffee can overstimulate your nervous system, leading to jitters, anxiety, digestive upset, a racing heart, and sleep ...

correction: Corrects the source of the study and corrects a typo in the article. GREEN BAY, Wis. (WBAY) - Health officials are warning parents about caffeine dangers to teens and pre-teens. “Even with ...

“As an emergency medicine doctor, I’ve seen patients come in with signs of caffeine toxicity,” Dr. Sonya Rashid said. “Their hearts are beating pretty fast. You’re feeling kind of jittery, anxious.” ...

A staggering 94% of Americans use caffeine, 64% of whom do so on a daily basis. It’s the energy enhancer people start their ...

A Washington state man celebrated his birthday this year by treating himself to the most expensive drink you can custom-order at Starbucks. Let's hope he didn't chug that toxic — and potentially ...