Question: how much coffee can you have on the keto diet?
Answer: Drinking it black is completely calorie free, but many keto dieters will appreciate the added fat that heavy cream provides, says Scott Keatley, RDN, of Keatley Medical Nutrition Therapy in New York City. For adults, up to 400 milligrams (mg) per day of caffeine is considered safe, according to the Mayo Clinic.