Info: 60 Veg. Capsules
L-Tryptophan, an essential amino acid, is needed to produce serotonin (a neurotransmitter involved in sleep and mood), melatonin (a neurohormone, also related to sleep), and niacin (vitamin B3), all of which assist in the regulation of sleep, positive mood and immune system function.
Info: 60 Veg. Capsules
L-Tryptophan, an essential amino acid, is needed to produce serotonin (a neurotransmitter involved in sleep and mood), melatonin (a neurohormone, also related to sleep), and niacin (vitamin B3), all of which assist in the regulation of sleep, positive mood and immune system function.
Product Notes:
An Essential Amino Acid for Sleep Regulation
L-Tryptophan must be obtained nutritionally, as it's not made by the body, and even if it's present in many of the foods you're eating, there may not be enough of it being taken up by the brain, since other neutral amino acids (tyrosine, phenylalanine, valine, leucine, and isoleucine) compete with it at the neuroreceptors, so a supplement may be in order to maintain good health and proper sleep and mood balance.
NOW Foods tests all L-Tryptophan to ensure it is uncontaminated by potentially harmful Peak E and microorganisms.
Related Product: Looking for a powder? See Zenbev.
Ingredients:
Per capsule:
220 mg L-Tryptophan.
Non-medicinal ingredients: Veg. Capsule (hypromellose and water), Stearic Acid, Hydroxypropyl Methylcellulose.
Suggested Usage:
Adult dosage: Take 1 capsule daily with meals. Store in a cool, dry place.
Warnings:
Consult a healthcare practitioner prior to use if you are pregnant or breastfeeding. Tryptophan supplementation should be avoided in depression with reversed diurnal variation. Patients with liver cirrhosis should avoid tryptophan supplementation.
Health Canada Natural Product Number: 80035972.
Supporting Science:
Comai, Stefano et al. “Tryptophan in health and disease.” Advances in Clinical Chemistry, 2020.
Gao, Jing et al. “Impact of the Gut Microbiota on Intestinal Immunity Mediated by Tryptophan Metabolism.” Frontiers in Cellular and Infection Microbiology, 2018.
Hogenelst, Koen et al. “The Effects of Tryptophan on Everyday Interpersonal Encounters and Social Cognitions in Individuals with a Family History of Depression.” The International Journal of Neuropsychopharmacology, 2015.
Sutanto, Clarinda N et al. “The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression.” Nutrition Reviews, 2022.
Young, Simon N. “How to increase serotonin in the human brain without drugs.” Journal of Psychiatry & Neuroscience: JPN, 2007.
Young, Simon N. “The effect of raising and lowering tryptophan levels on human mood and social behaviour.” Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 2013.