The key difference between the caffeine in Matcha and the caffeine in coffee is that with Matcha the caffeine is absorbed slowly and steadily. Any negative effects typically associated with caffeine are ameliorated by the calming and relaxing effect of the L-theanine. In combination, these compounds induce a healthy, sustainable energy boost unlike any other beverage on the market. Green tea typically has less caffeine than black tea, and one serving (1 gram) of Matcha contains approximately 20-35 mg of caffeine which is much less than a cup of coffee at 80 120mg.