2 to 3 Cups of Coffee Daily May Help Lower Stress, Improve Mental Health

By Mandy French, Mar 30, 2026

“These findings are consistent with the pharmacologic effects of caffeine, in addition to the possible benefits of polyphenols in coffee,” said Alex Dimitriu, MD, double board certified in psychiatry and sleep medicine, and founder of Menlo Park Psychiatry & Sleep Medicine. Dimitriu was not involved in the study. “A moderate amount of coffee has the benefit of boosting mood, energy, and resilience to stress. Keep in mind that in most studies, a cup is considered an 8-oz cup, which typically has about 80 to 100 milligrams (mg) of caffeine. Do not interpret the results of this study to drink 2 to 3 20-oz cups per day,” he told Healthline.

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