L-tryptophan is an amino acid that is made from plant or animal sources. L-tryptophan is known as an “essential” amino acid because the body does not produce it. L-tryptophan is important to the functions of many organs in the body. When you consume L-tryptophan, your body absorbs it and changes it to eventually become a hormone called serotonin.
1.Treatment of premenstrual dysphoric disorder
L-tryptophan is found in meats such as turkey and chicken. It is also found in: bananas, chocolates , cheese, dried dates, milk, soy, tofu, etc .