Add Yahoo as a preferred source to see more of our stories on Google. What a new study says about caffeine. (Getty Creative) (pixelfit via Getty Images) You may wake up in the morning desperate for a ...

It's generally safe to drink four 8-ounce (oz) cups of coffee per day, or about 400 milligrams (mg) of caffeine. If you drink more than that, you may feel anxious, jittery, or nauseous. Consuming too ...

Too much coffee can be a latte for the heart to handle, with a new study linking over 400 milligrams of caffeine a day — roughly a venti-size coffee at Starbucks — to an increased risk of ...

Welcome to Culture Clinic, MedPage Today's collaboration with Northwell Health to offer a healthcare professional's take on the latest viral medical topics. While caffeine -- usually in a cup of ...

We've all been there. With a busy morning ahead, you have an extra cup of coffee to help you power through, not realizing that it's one too many. Now instead of being able to focus, you're irritable ...

Secret side effects of drinking coffee on an empty stomach, according to experts.

Amanda Gardiner investigates what caffeine does to our bodies, from exam-term energy boosts to post-coffee crashes ...

Paraxanthine is being marketed as a smooth Early research suggests paraxanthine may provide an energy boost with fewer ...

You may wake up in the morning desperate for a cup of coffee (or four) to kickstart your day. However, a new study says that overdoing it on caffeine may have implications for your heart. The new ...