L-Theanine is discovered as a flavorous and characteristic component of tea. Theanine can be found in all parts of the tea plant with variant contents in different parts. concentration of Theanine account for 1-2% of dry weight of leaves while the seed capsule and cotyledon have the least. The content of Theanine is different due to the difference in raw tea leaves and processing methods. The content of Theanine is the highest in white tea and then green tea, white tea, yellow tea, black tea and oolong tea in turn. Any specification as you need