L-Tryptophan 500 mg™

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 1–3 Capsule(s) · 1 per day

Not Present

• 

  Protocol For Life Balance L-Tryptophan 500 mg

  Herbs Direct4.7(143)

  $23.00
• 

  Nutricost L- Tryptophan Capsules

  Target4.1(231)

  $15.95
• 

  Now Foods L-Tryptophan 500 mg

  DPS Nutrition4.6(5600)

  $20.99
• 

  Swanson L- Tryptophan 500 mg 90 Veggie Capsules

  Swanson Health Products4.7(2000)

  $9.58
• 

  365 by Whole Foods Market L- Tryptophan 60 Veggie Capsules

  Whole Foods Market

  $18.99
• 

  Life Extension L- Tryptophan 500 mg 90 Vegetarian Capsules

  Life Extension4.7(505)

  $24.75
• 

  Best Naturals L-Tryptophan mg 60

  Walmart - Best Naturals4.5(135)

  $12.99
• 

  BulkSupplements L-Tryptophan Capsules

  BulkSupplements.com4.8(112)

  $18.97

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• Willner Chemists

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  100 Park Ave, New York, NY 10017

  Directions(800) 633-1106

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  8420 Eager Rd, St. Louis, MO 63144

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  181 W Crossroads Pkwy Ste F, Bolingbrook, IL 60440

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• GNC

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  753 Broadway Spc 753, New York, NY 10003

  Directions(212) 380-5999

• Vitakem Nutraceutical Inc.

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  811 W Jericho Turnpike, Smithtown, NY 11787

  Directions(800) 233-2112

• SameDaySupplements.com

  4.5 (503)

  Vitamin & supplements store

  64 Nancy St Unit c, West Babylon, NY 11704

  Directions(631) 539-7339

• A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning

  AM Kikuchi, A Tanabe, Y Iwahori - Journal of dietary supplements, 2021 - Taylor & Francis

  … Library, and Ichu-shi according to PRISMA guidelines. As a result, 11 RCTs met the criteria … and negative mood in healthy adult populations. We have targeted healthy adult men and …

  2021109 citations

• 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

  … The purpose and protocol of this study were explained to all … -vitamin supplements at least once during the previous month were excluded. All participants passed the regular medical …

  201379 citations

• Analysis, nutrition, and health benefits of tryptophan

  M Friedman - International Journal of Tryptophan Research, 2018 - journals.sagepub.com

  … of some of the reported health-promoting aspects of … Here, tryptophan refers to l-tryptophan and the isomeric form … the dietary supplementation of tryptophan to healthy adults (n …

  2018402 citations

• L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications

  DM Richard, MA Dawes, CW Mathias… - International …, 2009 - journals.sagepub.com

  … uses of L-tryptophan, particularly L-tryptophan depletion, and on clinical trials that have been conducted using L-tryptophan supplementation… are necessary for general healthy nutrition. …

  2009981 citations

• Optimizing protein quality: synergies and comparisons of single and combined alternative proteins from diverse sources

  K Broucke, S Van De Walle, M Mefleh… - … Food Research and …, 2025 - Springer

  … Threonine is also available on the market as a dietary supplement, and its intake has been associated with maintaining a healthy gut [78, 81]. All the tested alternative protein sources …

  202521 citations

• chemotherapy regimens (World Health Organization [WHO], unpublished data), the estimated annual number of deaths from TB in the developing world is> 2,500, 000

  ALM High - Morbidity and Mortality Weekly Report: MMWR, 1990 - books.google.com

  … Editorial Note: On November 17, 1989, the Food and Drug Administration (FDA) recalled all dietary supplements that provided a daily dose of L-tryptophan (LT)≥ 100 mg. By March 22, …

  1990

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-07-25. DSLD Label ID: 11367. 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.