L-Tryptophan 500 mg

Suggested Use

SUGGESTED USAGE: As a dietary supplement; take 1-2 capsules 2 to 3 times daily on an empty stomach; with final dose at bedtime; or as directed by your healthcare practitioner.

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  Protocol For Life Balance L-Tryptophan 500 mg

  Vitacost.com4.7(96)

  $23.00
• 

  Protocol For Life - L-Tryptophan 500mg - 60 Capsules

  Pure Prescriptions4.7(96)

  $23.00
• 

  PROTOCOL FOR LIFE L-Tryptophan 500 mg - 60 Veg Caps

  Hasan Mirza, MD4.7(96)

  $23.00
• 

  L-Tryptophan 500 mg. (60 vegetarian capsules) ~ Protocol for Life

  vitalgoods.com4.7(96)

  $24.20
• 

  L-Tryptophan 500 mg

  Curated Wellness4.7(96)

  $23.00
• 

  Protocol For Life Balance L-Carnitine 500 mg 60 Capsules

  iHerb4.8(88)

  $27.00
• 

  Natural Balance L- Tryptophan 500 mg 60 ct

  Vitacost.com4.4(19)

  $29.69
• 

  Life Extension L- Tryptophan 500 mg 90 Capsules

  Life Extension4.7(496)

  $24.75

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• GNC

  4.3 (66)

  Vitamin & supplements store

  4014 S Semoran Blvd, Orlando, FL 32822

  Directions(407) 277-7884

• Nature's Market & Fitness

  4.6 (118)

  Vitamin & supplements store

  3074 Curry Ford Rd, Orlando, FL 32806

  Directions(407) 207-0067

• The Vitamin Shoppe

  4.6 (269)

  Vitamin & supplements store

  3807 E Colonial Dr, Orlando, FL 32803

  Directions(407) 895-9989

• Forever Young Health Foods

  4.9 (47)

  Vitamin & supplements store

  697 N Semoran Blvd Ste A, Orlando, FL 32807

  Directions(407) 282-4711

• Nature's Dynamics

  4.9 (103)

  Vitamin & supplements store

  3802 Silver Star Rd, Orlando, FL 32808

  Directions(813) 909-9191

• GNC

  4.0 (80)

  Vitamin & supplements store

  5833 S Goldenrod Rd, Orlando, FL 32822

  Directions(407) 282-5674

• VitaGym LLC

  5.0 (23)

  Vitamin & supplements store

  4425 Hoffner Ave, Orlando, FL 32812

  Directions(407) 218-0227

• LifeSource Vitamins

  4.4 (21)

  Vitamin & supplements store

  6869 Stapoint Ct Ste 114, Winter Park, FL 32792

  Directions(800) 567-8122

• Oral tryptophan activates duodenal aryl hydrocarbon receptor in healthy subjects: a crossover randomized controlled trial

  GH Rueda, N Causada-Calo… - American Journal …, 2024 - journals.physiology.org

  … with l-tryptophan supplementation, which is not surprising as this study was performed in healthy … l-Tryptophan supplementation did not affect cytokine production by PBMC with placebo, …

  202428 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 …

  20266 citations

• L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications

  DM Richard, MA Dawes, CW Mathias… - International …, 2009 - journals.sagepub.com

  … general healthy nutrition. While typical intake for many individuals is approximately 900 to 1000 mg daily, the recommended daily allowance for adults is estimated to be between 250 …

  2009967 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 As A Nutraceutical–Clinical And A Critical

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

  … L Tryptophan is available in the commercial product as 125 mg/ capsule or 500 mg/ capsule … was lowered in preeclamptic compared with the healthy placental arteries, consistent with …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-07-25. DSLD Label ID: 23607. 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.