L-Theanine is a natural Amino Acid found in the leaves of Black and Green teas in high concentrations and is the primary factor responsible for the calming affect of these beverages. Studies have found it helps reduce anxiety and is a natural counterpoint to the undesirable effects of Caffeine while at the same time enhancing Caffeine's positive attributes. Formulated as a Sublingual Liquid Supplement for Maximum Absorption. Oral pills and capsules must first survive the destructive digestive system, then be processed by the Liver before entering the blood stream. It is not uncommon for oral nutrients to be reduced by 50% to 97% before being absorbed into the blood for systemic distribution. Formulated properly and taken as directed, sublinguals can achieve up to 98% absorption. Product comes with a Pharmaceutical grade Pump Applicator which delivers a precise metered dose every time, eliminating the need for imprecise, awkward, fragile, and hard to keep clean Eyes Droppers that most liquid supplements use. This product is perfect for those who are unable or don't like taking pills, or for those who simply want the most Bio-Available supplement possible.