Life Choice L-Tryptophan with Vit B6 - precursor to Serotonin and Melatonin 60vcapsTryptophan is an essential amino acid, used by the brain to produce serotonin, a necessary neurotransmitter which transfers nerve impulses from cell to cell, and is responsible for normal sleep. Use Life Choice L Tryptophan to alleviates stress, benefit the heart, assist in weight control as an appetite suppressant, and enhance the release of growth hormone. L Tryptophan from Life Choice is formulated with the addition of Vitamin B 6 which is required