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) · 2–3 per day

Not Present

• 

  Nutricost L- Tryptophan Capsules

  Vitacost.com4.6(1700)

  $15.95
• 

  Now Foods L-Tryptophan 500 mg

  Walmart4.6(5600)

  $22.22
• 

  Vitacost L- Tryptophan 500 Mg 120 Capsules

  iHerb4.6(142)

  $9.74
• 

  Nutricost L-tryptophan 500mg, 120 Capsules - With Bioperine, Gluten

  eBay - supp-delight

  $26.99
• 

  The Vegan Shoppe L- Tryptophan 500mg 120 Veggie Capsules

  The Vitamin Shoppe4.7(45)

  $36.99
• 

  Best Naturals L- Tryptophan 500 Mg 120 Capsules

  Target

  $26.95
• 

  Swanson L- Tryptophan 500 mg 90 Veggie Capsules

  Swanson Health Products4.7(1900)

  $9.58Lowest
• 

  BulkSupplements L-Tryptophan Capsules

  BulkSupplements.com4.8(112)

  $18.97

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.

• SupplementRelief

  5.0 (27)

  Vitamin & supplements store

  9618 Jefferson Hwy Suite D-191, Baton Rouge, LA 70809

  Directions(888) 424-0032

• The Vitamin Shoppe

  4.4 (142)

  Vitamin & supplements store

  7601 Andrea Dr, Baton Rouge, LA 70809

  Directions(225) 292-5927

• Radiant Health of Baton Rouge

  5.0 (8)

  Vitamin & supplements store

  7809 Jefferson Hwy Ste b-6, Baton Rouge, LA 70809

  Directions(225) 930-0658

• GNC

  4.1 (66)

  Vitamin & supplements store

  9634 Airline Hwy Ste F6, Baton Rouge, LA 70815

  Directions(225) 237-3030

• ANGIOGENESIS LABS

  5.0 (21)

  Vitamin & supplements store

  8032 Summa Ave STE D, Baton Rouge, LA 70809

  Directions(225) 936-1027

• Old Paths Natural Market

  4.9 (69)

  Vitamin & supplements store

  13623 Hooper Rd b, Baton Rouge, LA 70818

  Directions(225) 478-8890

• Totally Loaded Nutrition

  4.5 (26)

  Health food store

  4415 S Sherwood Forest Blvd, Baton Rouge, LA 70816

  Directions(225) 250-5377

• GNC

  4.3 (50)

  Vitamin & supplements store

  6725 Siegen Ln SPACE V, Baton Rouge, LA 70809

  Directions(225) 364-3305

• 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

  … This systematic review includes 11 RCTs that examined the effects of TRP intake on positive and negative mood in healthy adult populations. We have targeted healthy adult men and …

  2021109 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

• Health benefits of tryptophan in children and adults

  BN Nayak, HS Buttar - J. Pharm. Sci. Technol. Manage, 2015 - pharmacy.nmims.edu

  … overview of the role of L-tryptophan in the synthesis of serotonin, … trials suggest that L-tryptophan supplementation may be … [7], the kynurenine pathway depicts an aerobic L-tryptophan …

  201512 citations

• Newer Technologies for Use and Delivery of Nutraceuticals to Cure Insomnia and Induce Sleep

  A Mukherjee - Nutraceuticals in Insomnia and Sleep Problems, 2025 - taylorfrancis.com

  … “Nutricost L-Tryptophan Capsules” are easy to swallow capsules with 500 mg L-Tryptophan … the nutraceuticals proving to be a savior to numerous health concerns, there are a lot of key …

  20251 citations

• Risk Assessment of" Other Substances"–L-tryptophan

  K Holvik, L Frøyland, M Haugen, M Løvik… - European Journal of …, 2020 - hal.science

  … well-designed supplementation studies with L-tryptophan in … adverse health effects of L-tryptophan supplementation in … possible adverse effects of L-tryptophan supplements, due to the …

  20202 citations

• The Effect of Griffonia simplicifolia on Pain Intensity, Central and Peripheral Sensitization, and Pain Modulation in Healthy Volunteers—A Randomized …

  AJ Schlemmer, S Hammer, S Fandler-Höfler… - Nutrients, 2026 - mdpi.com

  … amino acid derived from L-tryptophan via hydroxylation at the … either 100 mg of Griffonia simplicifolia (Nutricost, Vineyard, UT… Griffonia simplicifolia supplementation demonstrated limited …

  2026

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2020-06-24. DSLD Label ID: 223418. 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.