Life Extension L-Tryptophan, 500 mg, Encourages Healthy Serotonin Levels and Promotes Healthy Sleep, Mood, Stress Response Satiety, Gluten-Free, Non-GMO, Vegetarian, 90 Capsules Support your serotonin levels?Serotonin is a neurotransmitter that is involved in restful sleep and positive mood. Your body needs adequate levels of the amino acid tryptophan to make it. Get some shuteye?Modern lifestyles make it hard to get enough rest. L-Tryptophan encourages serotonin production, which in turn promotes restful, restorative sleep. Mood satiety?Tryptophan promotes healthy mood as well as satiety, the sensation of being full. Speaking of mood: tryptophan encourages your body?s healthy response to stress. Ingredients matter?We use the finest raw ingredients with the quality and purity you deserve. The majority of our products are non-GMO, gluten-free and manufactured in the USA?and a Certificate of Analysis is available for every one.???? Live your healthiest life?We believe the answers to a healthier life are in reach, and that scientific research is the key to getting there. That?s why so many of our formulas feature specific ingredients and amounts based on scientific studies. From the manufacturer What is L-Tryptophan? This formula contains 500 mg of L-tryptophan to encourage healthy serotonin levels and support healthy sleep and mood. L-Tryptophan also helps modulate your body?s natural stress response and promotes satiety. C?mon, get happy Your body needs tryptophan to make serotonin, the ?happiness neurotransmitter.? Get some ZZZs Thanks to its support of serotonin, tryptophan promotes healthy, restful sleep. Mood support Studies show tryptophan encourages the body?s healthy response to stress. Your body deserves the best Our formulators hold advanced degrees and use the latest research to decide on the optimal dosages. Serotonin is a neurotransmitter in the brain associated with positive moods and restful sleep. To produce and maintain optimum serotonin levels, your body requires tryptophan, an essential amino acid the body can?t produce. Life extension offers L-Tryptophan capsules to broadly and powerfully support tryptophan levels already within the normal range.