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: 1–2 Capsule(s) · 1 per day

Not Present

• 

  Metabolic Maintenance L- Tryptophan 500mg 60 Capsules

  iHerb4.7(47)

  $40.00
• 

  NOW Foods L- Tryptophan Relaxation Support Capsules

  CVS Pharmacy4.6(4100)

  $20.99
• 

  365 by Whole Foods Market L- Tryptophan 60 Veggie Capsules

  Whole Foods Market

  $18.49
• 

  Nutricost L- Tryptophan Capsules

  Target4.1(231)

  $15.95
• 

  Now Foods L-Tryptophan 500 mg

  DPS Nutrition4.6(5600)

  $20.99
• 

  Glycine Metabolic Maintenance Capsules

  iHerb4.8(67)

  $48.00
• 

  Best Naturals L-Tryptophan mg 60

  Walmart - Best Naturals4.5(135)

  $12.99
• 

  Life Extension L- Tryptophan 500 mg 90 Vegetarian Capsules

  PureFormulas.com4.7(505)

  $24.75

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

  4.1 (185)

  Vitamin & supplements store

  1951 Mt Zion Rd, Morrow, GA 30260

  Directions(678) 479-6636

• QRD Specialty Supplements

  5.0 (2)

  Vitamin & supplements store

  501 GA-138 #6, Riverdale, GA 30274

  Directions(855) 773-4621

• GNC

  4.0 (32)

  Vitamin & supplements store

  7022 GA-85, Riverdale, GA 30274

  Directions(770) 302-2600

• Quantum Natural Health & Wellness

  4.9 (13)

  Vitamin & supplements store

  501 GA-138, Riverdale, GA 30274

  Directions(855) 764-4473

• All in One Vitamins

  4.9 (32)

  Vitamin & supplements store

  742 Glynn St N # D, Fayetteville, GA 30214

  Directions(678) 519-0634

• GNC

  1.7 (21)

  Vitamin & supplements store

  2091 Mt Zion Blvd #400, Jonesboro, GA 30236

  Directions(770) 302-2957

• 4Life Transfer Factor

  5.0 (2)

  Vitamin & supplements store

  1981 Hwy 138 SW, Riverdale, GA 30296

  Directions(470) 257-3000

• Vitamins and Beyond

  5.0 (1)

  Vitamin & supplements store

  3015 RN Martin St #131, East Point, GA 30344

  Directions

• Tryptophan As A Nutraceutical–Clinical And A Critical

  MR Suchitra, P Krubaa, S Parthasarathy - European Journal of Molecular & … - academia.edu

  … Trp levels can be used by clinicians to diagnose various metabolic … L Tryptophan is available in the commercial product as 125 … was lowered in preeclamptic compared with the healthy …

• A perspective on the safety of supplemental tryptophan based on its metabolic fates

  JD Fernstrom - The Journal of nutrition, 2016 - academic.oup.com

  … supplemental tryptophan ingestion might any of the products of these metabolic pathways present a health … are increased in humans after the ingestion of L-tryptophan (2 g) (64). I3S …

  201698 citations

• Tryptophan intake, not always the more the better

  D Hu, J Liu, W Yu, C Li, L Huang, W Mao, Z Lu - Frontiers in Nutrition, 2023 - frontiersin.org

  … acid, indoxyl sulfate indicated excess L-tryptophan is metabolized through the kynurenine and indole derivatives metabolic pathways both in healthy rats and adenine-induced CKD rats…

  202336 citations

• Serotonin, Kynurenine, and Indole Pathways of Tryptophan Metabolism in Humans in Health and Disease

  M Holeček - Nutrients, 2026 - mdpi.com

  … Many bacteria, including the genera Escherichia, Clostridium, and Bacteroides, hydrolyze TRP by tryptophanase (L-tryptophan indole-lyase) to indole, which exerts beneficial effects on …

  202613 citations

• Analysis, nutrition, and health benefits of tryptophan

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

  … health-promoting aspects of tryptophan, tryptophan-containing foods, and foods with added (supplemented) tryptophan. Here, tryptophan refers to l-tryptophan … 4 tryptophan metabolism …

  2018402 citations

• Quantitative aspects of tryptophan metabolism in humans and other species: a review

  JE Leklem - The American journal of clinical nutrition, 1971 - Elsevier

  … These ratios show that with a 2.0-g load of L-tryptophan, … Dogs loaded with 1 or 2 g L-tryptophan … 214C was given with and without a load of L-tryptophan. …

  1971246 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2022-09-22. DSLD Label ID: 274069. 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.