L-theanine is an amino acid with interesting properties found in green tea leaves and other varieties of tea. It is not used to build proteins, but it plays a role in numerous functions of the human body. This Now Foods product contains 200mg of L-theanine and 100mg of Inositol, important nutrients for the body. The capsules are suitable for a vegan diet, undergo quality and purity testing in independent laboratories, and do not contain gluten or genetic engineering. It is recommended to take 1 capsule daily on an empty stomach with plenty of water. Dietary supplements do not replace a balanced and varied diet. Store out of reach of children. Consult your doctor before using if you are being treated for an illness, pregnant, or breastfeeding.