How Much Coffee Is Safe to Drink Each Day?

How Much Coffee Is Safe to Drink Each Day?

How Much Coffee Is Safe to Drink Each Day? By Dr. John Bartemus, DC, CFMP, Functional Medicine Charlotte, PC. Published July 20, 2026. Short answer: For most adults, up to about 400 mg of caffeine per day, roughly 3 to 5 eight-ounce cups of black coffee, is safe and...