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 Vcap(s) · 2–3 per day

Not Present

• 

  Nutricost L- Tryptophan Capsules

  Target4.1(231)

  $15.95
• 

  NOW Foods L- Tryptophan Relaxation Support Capsules

  Swanson Health Products4.6(4100)

  $15.49
• 

  Now Foods L-Tryptophan 500 mg

  NOW4.6(5600)

  $21.99
• 

  L-Tryptophan Pure Encapsulations

  Supplement First4.6(42)

  $124.50
• 

  Best Naturals L-Tryptophan mg 60

  Best Naturals4.5(135)

  $9.99
• 

  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
• 

  Swanson L- Tryptophan 500 mg 90 Veggie Capsules

  Target4.7(2000)

  $13.69

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• ITL Health

  5.0 (37)

  Vitamin & Supplements Shop

  50 Broadway, London SW1H 0BL

  Directions0118 321 7628

• RightNutri

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  26 Queenstown Rd, London SW8 3RX

  Directions0800 098 8888

• Love Life Supplements

  4.8 (87)

  Vitamin & Supplements Shop

  wellington house, East Rd, Petersfield, Cambridge CB1 1BH

  Directions0800 122 3351

• London Supplements

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  Vitamin & Supplements Shop

  13, Waverley Industrial Park Waverley Industrial Estate, Hailsham Dr, Harrow HA1 4TR

  Directions020 8863 0300

• Novomins

  4.9 (480)

  E-commerce service

  Suite 1000, 405 King's Rd, London SW10 0BB

  Directions01863 723207

• British Supplements

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  Vitamin & Supplements Shop

  9-11 Thomas St, Portadown, Craigavon BT62 3NP

  Directions

• British Supplements

  3.4 (275)

  Vitamin & Supplements Shop

  34, New House, 67-68 Hatton Garden, London EC1N 8JY

  Directions07768 405406

• Supplemented

  4.7 (192)

  Vitamin & Supplements Shop

  Online Retail Ltd Box 1031A, Surbiton, Kingston upon Thames KT1 9AH

  Directions

• 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

  BMD Knapp, MJ Cupp, TS Tracy - … Supplements: Toxicology and Clinical …, 2003 - Springer

  … ill patients who might be of generally worse health than controls and therefore more likely to use a dietary supplement such as L-tryptophan. Of the patients identified with eosinophil …

  20035 citations

• 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

• 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

  … intake of the essential amino acid L-tryptophan (L-Trp) have … Indeed, pellagra remains a public health problem in many … the nutritional requirements for L-Trp (300 mg/d in adults) (12) …

  201379 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

  … , when healthy rats were fed diets supplemented with excessive L-tryptophan (1.8%) for 3 … barrier function is impaired, so tryptophan supplementation may play a positive role by …

  202336 citations

• Effects and side effects associated with the non-nutritional use of tryptophan by humans

  JD Fernstrom - The Journal of nutrition, 2012 - academic.oup.com

  … amounts of Trp as an amino acid supplement. The reason is not … syndrome,’’ which requires medical attention. The symptoms of … Effect of L-tryptophan on brain serotonin metabolism in …

  2012143 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2022-02-23. DSLD Label ID: 266375. 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.