L-Theanine  is an amino acid commonly found in tea (infusions of Camellia sinensis). Contrary to caffeine, L-Theanine increases the levels of GABA (gamma-aminobutyric acid), which is a neurotransmitter inhibitor that produces a feeling of relaxation and creates a state of well-being. In addition, it is well documented that L-Theanine increases mental awareness, encourage relaxation without causing sleepiness, reduces stress and anxiety, improves cognition, concentration and sleep quality. It also helps in diminishing the side effects of caffeine while building up the immune system response.

A can of Slow Cow contains 100 mg of L-Theanine.