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L-Tryptophan 500mg 90 Capsule Mood, Relaxation, SleepThe essential amino acid L-tryptophan helps support relaxation, restful sleep, and feeling better. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.Suggested Usage: 1 tablet 3 times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 tablets before bed. Supplement Facts Serving Size: 3 Capsules Servings Per Container: 30 Amount Per Serving % Daily Value*** Iron (naturally occurring) 0.6 mg 3% L-Tryptophan (25 mg naicin equivalents) 1.5 g * *Daily Value Not Established***Percent Daily Values are based on a 2,000 calorie dietOther Ingredients: gelatin (capsule), magnesium stearate, silica, microcrystalline cellulose, and dibasic calcium phosphateDoes Not Contain: Yeast, dairy, egg, gluten, corn, soy or wheat, sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.Warnings: Keep out of reach of children. As with all dietary supplements, consult your healthcare professional before use. See product label for more information. If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs, consult your health care professional before using this product.