In general, consuming matcha in moderation is considered safe for most people. Drinking matcha every day may have health benefits. But keep in mind that it contains caffeine, a stimulant. Excessive caffeine intake may have negative effects on some people. Consume matcha in moderation and pay attention to your body's signals. If caffeine keeps you up in the evenings, consider consuming matcha earlier in the day. Healthy adults can safely consume up to 400 milligrams of caffeine daily, according to the U.S. Food and Drug Administration. Pregnant women should restrict their caffeine consumption to 200 milligrams per day, as advised by the American College of Obstetricians and Gynecologists. [4] However, you should consult with a healthcare professional before making any significant changes to your diet or lifestyle, especially if you have any underlying medical conditions or take medications.