L-Tryptophan-1000 60tab contains l-tryptophan and other ingredients to regulate sleep patterns, disposition and immune system. L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. In the brain, tryptophan converts to serotonin, the neuro-transmitter that is responsible for feelings of well-being, calmness, personal security, relaxation, and confidence. Some serotonin is converted in the pineal gland to melatonin, which helps to regulate sleep patterns.Every lot of Protocol For Life Balance L-Tryptophan is tested to be free of Peak E and microbial contamination. Supports Relaxation Promotes a Restful Sleep Encourages Positive Mood Suggested Usage: As a dietary supplement, take 1 tablet 1 to 3 times daily on an empty stomach or as directed by your healthcare practitioner. Best used at bedtime. Protocol for Life Balance L-Tryptophan 1,000mg Facts: 1 tablet contains: L-Tryptophan 1.0 g (1,000 mg) Other Ingredients: Cellulose, Stearic Acid (vegetable source), Croscarmellose Sodium, Magnesium Stearate (vegetable source), Silica and Vegetarian Coating.