Product Overview: Zahler L-Tryptophan Purified L-Tryptophan 500 Mg 60 Capsules. Product Descriptions: 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 fom which effectively crosses the blood-brain barrier. It is highly probable that unhealthy eating habits, as well as too much stress and too little time, make that few people are able to meet their body's requirement for L-Tryptophan and therefore really ought to supplement their intake of this vital amino acid. A deficiency in this essential amino acid can lead to erratic mood swings and occasionally even depression, as L-Tryptophan performs important functions in the nervous system as a producer of messengers. Zahler's L-Tryptophan contains a robust dose of 500 mg per capsule in a most potent and purified form.. Product Features: High potency serotonin booster Mood, relaxation and sleep support Contains 500 mg L-Tryptophan per capsule Non GMO Gluten free Dairy Free Soy Free Vegetarian Friendly How To Use: The recommendation is to always start with 1 pill daily for 2 weeks. If after taking the L-Tryptophan daily for 2 weeks you feel like you need more support, you can add on another L-Tryptophan capsule at a different time of the day. Cautions & Warnings: Consult a Healthcare Professional: Before starting any new supplement, especially if you have any pre-existing medical conditions or are taking other medications. Dosage: Do not exceed the recommended dosage. Overconsumption may lead to adverse effects. Storage: Keep out of reach of children. Store in a cool, dry place. Ingredients: Contains L-Tryptophan 500 mg Nutritional Facts: