L-Theanine 100 mg 90 vcaps by NOW is a dietary supplement friendly for vegetarian and vegans that is infused with decaffeinated green tea extract. Its main purpose is to promote a sense of relaxation without causing the body to undergo drowsiness or similar side effects generally felt with other depressants. It is also important in supporting the health of the functioning of the cardiovascular system. One to two capsules should be taken daily when needed.