L-Tryptophan

Other Combinations

Brand: Douglas Laboratories

CapsuleOff Market
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Net Contents

60 Vegetarian Capsules

Serving Size

2 Vegetarian Capsule(s)

Servings Per Container

Not specified

Supplement Form

Capsule

Bar Code (UPC/SKU)

3 10539 03414 9

Product Version

Not specified

Suggested Use

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

Market Reference

$9.99 – $395.00· 40 listings
  • Douglas Laboratories L- Tryptophan 60 Capsules

    Herbs Direct4.7(6)
    $54.50
  • 365 by Whole Foods Market, Free-Form L-Tryptophan 500mg, Vegan, 60 Capsules

    Whole Foods Market
    $18.99
  • 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
  • L- Tryptophan

    SFI Health
    $43.99
  • Nutricost L- Tryptophan Capsules

    Target4.6(1600)
    $15.95
  • Horbaach L Tryptophan 1500mg 180 Capsules

    Walmart - Carlyle Nutritionals, LLC4.8(30)
    $19.69
  • L-Tryptophan 500 mg

    Curated Wellness4.6(1100)
    $18.25

Where to Buy Locally

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

    4.4 (133)

    Vitamin & supplements store

    721 Nassau Park Blvd, Princeton, NJ 08540

  • CAPSULYTE

    5.0 (19)

    Vitamin & supplements store

    320 Cranbury Half Acre Rd, Cranbury, NJ 08512

  • Everything Natural Too Inc

    4.9 (28)

    Vitamin & supplements store

    337 Applegarth Rd, Monroe Township, NJ 08831

  • Underground Nutrition

    5.0 (434)

    Vitamin & supplements store

    415 US-9 Ste 3, Englishtown, NJ 07726

  • America’s Finest, Inc.

    5.0 (2)

    Vitamin & supplements store

    20 Lake Dr, East Windsor, NJ 08520

  • Ares Nutrition

    4.8 (134)

    Vitamin & supplements store

    1061 White Horse Ave, Hamilton Township, NJ 08610

  • Mitch’s Wellness Store

    5.0 (1)

    Vitamin & supplements store

    812 White Pine Cir, Lawrence Township, NJ 08648

  • Ruesco Supplement Outlet

    4.6 (120)

    Vitamin & supplements store

    30 Eastern Ave, Somerville, NJ 08876

Research & Studies

  • 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
  • A heretofore undisclosed crux of eosinophilia-myalgia syndrome: compromised histamine degradation

    MJ Smith, RH Garrett - Inflammation Research, 2005 - Springer

    … L-tryptophan is the sole or major component [39]; a preceding “sharp upturn” [40] in nationwide consumption of L-tryptophan supplements … at peak excretions in healthy humans [179];24 …

    200543 citations
  • Post-Traumatic Stress Disorder (PTSD) & Anxiety

    L McNamara - drladdvip.com

    … (2) The amino acid 5-HTP (hydroxy-L-tryptophan) has been … supplement, as well as what is in the liver health supplement I … , can all be purchased from Douglas Labs by first creating a …

  • Chronic Fatigue Syndrome Nutritional Supplementation Helps Reduce the Symptoms & Progression of Chronic Fatigue Syndrome

    LR McNamara - drladdvip.com

    … disclaimer after the article, and consult your personal health care provider prior to acting … -L-Carnitine and DHEA from Douglas Labs. You can buy from Douglas Labs by first creating a …

  • L-Tryptophan 60 vcaps by Douglas Labs

    RNR Points

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-02-23. DSLD Label ID: 5345. 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.