Similarly, coffee appears to lower one’s level of saturated fatty acids, which is also associated with heart disease. As in the Tulane study, the “sweet spot for daily consumption can be found around 3 cups of coffee or tea (or 250 mg of caffeine).”

When you drink coffee or other caffeinated beverages, caffeine blocks the receptors in your brain that normally absorb adenosine. Adenosine is a molecule that makes you feel sleepy by slowing nerve activity in the brain.

It might make you more jittery. When you have coffee on an empty stomach, caffeine can enter your bloodstream faster, potentially making you more sensitive to its stimulant effects. This can leave you feeling jittery, restless, and anxious, and even cause your heart to race.

Medically reviewed by Cordelia Nwankwo, MD You can drink coffee during pregnancy, but moderation is key. The American College of Obstetricians and Gynecologists (ACOG) recommends limiting caffeine intake to 200 milligrams (mg) per day,

Morning coffee drinkers were found to have a lower overall mortality risk compared to the all-day coffee drinkers, per a new study.