Zen Theanine is L-theanine a unique amino acid found primarily in green tea. Studies show that theanine promotes calm relaxed alertness. The Calm In The Eye Of The Storm - Pure L-theanine - Promotes a calm relaxed alertness without causing drowsiness - Fast-acting and effective with one high dose capsule Amount: 1 Capsule L-Theanine 225 mg Non-medicinal ingredient: Capsule: hypromellose Suggested Use: (Adult): Take 1 capsule daily without food or as directed by a qualified health care practitioner. Cautions : Consult a health care practitioner prior to use if you are pregnant or breastfeeding.