L-theanine is an element that can be found in Matcha, L-theanine is the reason of the sweetness taste (umami) in Matcha.
Japanese green tea in general has higher L-theanine due to non-fermented process. Out of all Japanese green teas, Gyokuro and Matcha (Tencha) has higher L-theanine due to the shaded-grown (in Ooshita-en) method. Direct sun-light is blocked 20 days before harvested, this process increase the L-theanine content in the tea leaves.
There is no limit for consumption of L-theanine in Japan
Try out our ceremony grade Matcha, it has good taste and lot of health benefits.