Neuro SLEEP combines the benefits of melatonin with 5-HTP (5-hydroxytryptophan), magnesium and L-theanine, plus the superfruit extracts pomegranate, acai and blueberry. Melatonin is naturally produced in the body in the absence of sunlight to help prepare the body for rest. Melatonin is also ubiquitous in nature, occurring in plants, grains and some fruits, suggesting it may have other functions aside from regulating the biological clock (circadian rhythm) of mammals. The ingredient has been thoroughly studied for its effect on sleep (see expanded science for references). Magnesium is a mineral and electrolyte provided at 50 mg per bottle (13% DV). L-theanine is an amino acid found in green tea, which may not influence sleep, but has been studied for its purported relaxation effects. Lastly, 5-HTP is a form of L-tryptophan – an amino acid commonly associated with and found in turkey. 5-HTP is present in neuro SLEEP at a very low dosage.