Calming Formula combines L-Theanine, 5-HTP and Melatonin in an all-natural formula designed to aid calmness and healthy sleep. L-Theanine is an amino acid in green tea leaves; it increases relaxation and helps sleep by contributing to changes in the brain. L-Theanine raises levels of GABA, serotonin and dopamine. 5-HTP is the precursor of serotonin, an important substance for healthy nerve and brain function and the normal regulation of mood and normal sleep patterns These neurotransmitters work in the brain to regulate emotions, mood, and sleep. Melatonin acts as a natural aid for sleep regulation and the promotion of normal sleep cycles.