L-Tryptophan

Suggested Use

Suggested Usage: As a dietary supplement; adults take 2 capsules daily or as directed by your healthcare professional.

• 

  Douglas Laboratories L- Tryptophan 60 Capsules

  Cincinnati Health Institute4.7(6)

  $54.50
• 

  L-Tryptophan

  DrHagmeyer.com4.7(6)

  $43.34
• 

  Nutricost L- Tryptophan Capsules

  Target4.6(1600)

  $15.95
• 

  L-Tryptophan | TENSnet.com

  TensNet.com4.7(6)

  $54.50
• 

  Horbaach L Tryptophan 1500mg 180 Capsules

  Target4.8(30)

  $21.49
• 

  L-tryptophan Supplement Nighttime Formula

  Walmart - VitaPulse5.0(1)

  $17.95
• 

  The Vegan Shoppe L- Tryptophan 500mg 120 Veggie Capsules

  The Vitamin Shoppe4.7(50)

  $36.99
• 

  365 by Whole Foods Market, Free-Form L-Tryptophan 500mg, Vegan, 60 Capsules

  Whole Foods Market

  $18.99

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• The Vitamin Shoppe

  4.5 (275)

  Vitamin & supplements store

  3312 Greenwald Way N, Kissimmee, FL 34741

  Directions(407) 931-2023

• Top Tier Nutrition

  4.9 (241)

  Vitamin & supplements store

  1509 Osceola Pkwy, Kissimmee, FL 34744

  Directions(407) 201-2685

• GNC

  4.1 (86)

  Vitamin & supplements store

  2687 Osceola Pkwy Suite B5A, Kissimmee, FL 34741

  Directions(407) 932-5217

• Fitness Mart

  5.0 (6)

  Health food store

  3831 W Vine St, Kissimmee, FL 34741

  Directions(407) 870-0800

• Vitamin World

  3.3 (8)

  Vitamin & supplements store

  8200 Vineland Ave Ste 1791, Orlando, FL 32821

  Directions(407) 239-4990

• Salud Natural

  4.9 (15)

  Vitamin & supplements store

  1319 E Vine St, Kissimmee, FL 34744

  Directions(407) 334-6683

• Revitalife Vitamins & Supplements

  Vitamin & supplements store

  3831 W Vine St, Kissimmee, FL 34741

  Directions(407) 572-8250

• GNC

  4.1 (93)

  Vitamin & supplements store

  700 Centerview Blvd Spc #700, Kissimmee, FL 34741

  Directions(407) 201-6062

• Impact of the gut microbiota on intestinal immunity mediated by tryptophan metabolism

  J Gao, K Xu, H Liu, G Liu, M Bai, C Peng… - Frontiers in cellular and …, 2018 - frontiersin.org

  … In addition to serving as a nutrient enhancer, L-tryptophan (… are important for maintaining healthy bowels. Although the high … As an essential nutrient in mammals, L-tryptophan (Trp), and …

  20181,497 citations

• The biology and biochemistry of kynurenic acid, a potential nutraceutical with multiple biological effects

  LF Alves, JB Moore, DB Kell - International Journal of Molecular Sciences, 2024 - mdpi.com

  … Accordingly, improved functioning, and the potential for an extended and healthy lifespan, might … (viz L-tryptophan), we consider it worthwhile to review their properties in broad outline. …

  202436 citations

• Gut microbe-derived trimethylamine shapes circadian rhythms through the host receptor TAAR5

  KK Mahen, WJ Massey, D Orabi, AL Brown… - Elife, 2026 - elifesciences.org

  Elevated levels of the gut microbe-derived metabolite trimethylamine N-oxide (TMAO) are associated with cardiometabolic disease risk. However, the mechanism(s) linking TMAO …

  20261 citations

• L-Tryptophan 60 vcaps by Douglas Labs

  RNR Points

• Supplementing healthy women with up to 5.0 g/d of L-tryptophan has no adverse effects

  C Hiratsuka, T Fukuwatari, M Sano, K Saito… - The Journal of …, 2013 - academic.oup.com

  … intake of the essential amino acid L-tryptophan (L-Trp) have … Indeed, pellagra remains a public health problem in many … a dietary supplement to improve sleep patterns, mental health, …

  201379 citations

• DSHEA's failure: Why a proactive approach to dietary supplement regulation is needed to effectively protect consumers

  RE Nowak - University of Illinois Law Review, 2010 - papers.ssrn.com

  … supplements, such as ephedra, Ltryptophan, and Hydroxycut. Collectively, these dietary supplements … to prevent future health crises like those involving ephedra and L-tryptophan. The …

  201038 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-02-24. DSLD Label ID: 70440. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.