L-tryptophan is an essential amino acid, an important building block of proteins that your body cannot manufacture on its own and must get from the food that you eat. Your body requires tryptophan to perform a number of important tasks. The nutrient has been found to: * SUPPORT HEALTHY SLEEP. Tryptophan is needed to produce melatonin, chemical that controls your sleep cycle. * BALANCE YOUR MOOD. L tryptophan is a precursor to serotonin, the feel-good chemical that eases stress and regulates mood. * IMMUNE SYSTEM FUNCTION. The amino acid is needed to produce kynurenines, which help defend the body. * PROMOTES HEALTHY CIRCULATION & NERVOUS SYSTEM FUNCTION. Your body converts L-tryptophan to niacin to support blood flow and nervous system function. * SUPPORTS HEALTHY DIGESTION. Tryptophan helps your body metabolize nutrients and manufacture hydrochloric acid to break down your food. If your health care professional has recommended that you start taking a natural sleep supplement or L-tryptophan tablets to improve your health, Nutri-Essentials L Tryptophan Dietary Supplement is the best product to choose. Our L-tryptophan 500 mg dose is the amount that is frequently recommended by health care professional for those who need a sleep supplement or overall support for health and well-being. Plus, our tryptophan 500mg supplement is made in the USA at a GMP certified facility to ensure that our tryptophan tablets are pure, potent and safe. Complete your diet with the best choice of L-tryptophan supplements! Order Nutri-Essentials L Tryptophan Dietary Supplement and get 120 of our 500-milligram tablets.