L-Tryptophan®

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: 2 Vegetarian Capsule(s) · 1 per day

Not Present

• 

  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
• 

  L- Tryptophan

  SFI Health

  $43.99

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.

• GNC

  4.7 (35)

  Vitamin & supplements store

  1651-22 MS-1, Greenville, MS 38701

  Directions(662) 335-4820

• Healthway Nutrition Center

  4.8 (41)

  Health food store

  398 US-51, Ridgeland, MS 39157

  Directions(601) 856-8394

• Rollin Nutrition

  5.0 (4)

  Sports nutrition store

  33 Walnut St, Rolling Fork, MS 39159

  Directions(662) 873-1052

• The Vitamin Shoppe

  4.1 (118)

  Vitamin & supplements store

  1220 E Northside Dr #400, Jackson, MS 39211

  Directions(601) 362-1781

• Wholesale Nutrition Inc

  4.8 (381)

  Vitamin & supplements store

  2202 Goodman Rd E, Southaven, MS 38672

  Directions(662) 349-0211

• All In 1 Nutrition

  4.8 (23)

  Sports nutrition store

  458 Springridge Rd Ste E, Clinton, MS 39056

  Directions(601) 926-8045

• The Herb Shop

  4.5 (17)

  Vitamin & supplements store

  5310 Lakeland Dr, Brandon, MS 39042

  Directions(601) 992-6859

• GNC

  4.8 (12)

  Vitamin & supplements store

  2314 Iowa Blvd Ste 500, Vicksburg, MS 39180

  Directions(601) 638-9168

• 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

• Riboflavin (Vitamin B2) on the Label

  What riboflavin is, how much a typical product provides, and why it can change the color of urine.

  VitaSuppTrack Editorial· Jun 24, 2026

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: 10597. 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.