L-Tryptophan is an essential amino acid that serves as a precursor for the sleep hormone melatonin, for niacin and serotonin. Serotonin, an important neurotransmitter in the central nervous system, has a calming effect and plays a role in anger, aggression, mood, sleep, sexuality and appetite.‡

L-Tryptophan is the least abundant amino acid in the American diet. Even people on high protein diets generally get less than 1.5 grams daily. Supplementary L-Tryptophan provides nutritional support for restful sleep and positive mood.‡

TryptoPure® is produced by fermentation from vegetable sources, a process that yields 99%-100% pure, pharmaceutical grade L-Tryptophan. Manufactured in a pharmaceutical facility in Japan.‡

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*FDA Disclaimer: The information about this product and statements made are provided by the manufacturer, except customer reviews which are not evaluated. See www.progressivelabspro.com for information about the relationship between this product and any claims made. Results may vary from person to person based on body size and other factors, and the effectiveness is not guaranteed for you. Always seek the advice of your healthcare professional about taking dietary, nutritional, herbal or homeopathic supplements.