fromBuzzFeed
5 days ago7 Sneaky Habits That Can Cause Heart Problems
But too much coffee can have a negative effect because it "can speed up the heart, cause increased heart rate, cause contraction of the blood vessels and increased blood pressure, and certainly if you're prone to rhythm disturbances of the heart, the caffeine at high doses can cause that," Tadwalkar said. Caffeine is considered safe until 300 to 400 milligrams, and after that, it can have a cascade of negative effects.
Public health