Description Usage Supplement Facts L-Tryptophan is used by the brain as a precursor to serotonin and melatonin, neurotransmitters that are necessary for normal sleep. In addition to normal sleep, changes in the level of serotonin in the brain can impact mood and satiety. Adequate sleep is crucial for both healthy immune and nervous systems. Zahler’s L-Tryptophan is a potent and purified form which effectively crosses the blood-brain barrier.* *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Suggested Use Take 1 capsule daily or as directed by a healthcare professional. If you are pregnant, nursing, taking medication, or undergoing treatment for a medical condition, please consult your healthcare professional before using this product. Store in a cool, dry place and tightly capped. Keep out of the reach of children. Tamper resistant package, do not use if seal is missing. SUPPLEMENT FACTS Serving size: 1 capsuleServings per container: 60 Ingredients Amount %DV Vitamin B3 (from 500 mg L-Tryptophan) 8.3 mg 52% L-Tryptophan 500 mg † * % Daily Values are based on a 2,000 calorie diet.† Daily Value not established. Other Ingredients: Vegetable Capsule, Magnesium Stearate, Rice Flour.