A new study from American University in Washington, D.C. says that there is a condition where people are dependent on caffeine to the point that they suffer withdrawal symptoms and can’t reduce their caffeine consumption even when they should, like when their pregnant or have a heart condition. It’s called “Caffeine Use Disorder.” And this research team says some cases may call for treatment. They say the negative effects of caffeine often go unrecognized because it’s a socially acceptable drug. They suggest you consume no more than 400 mg per day—which is about two to three 8 oz cups of coffee. That’s if all else is fine. If you’re pregnant, have high blood pressure, or anxiety of such, keep it to less than 200 mg.