L-Tryptophan 1000 mg

Suggested Use

SUGGESTED USAGE: As a dietary supplement; take 1 tablet 1 to 3 times daily on an empty stomach or as directed by your physician. Best used at bedtime. Consider taking these other NOW(R) products: Inositol and Magnesium.

• 

  NOW Foods L- Tryptophan Double Strength 1000 mg 60 Tablets

  Swanson Health Products4.6(1400)

  $23.23
• 

  Now Foods L-tryptophan 1000mg Tablets (60-Count)

  Walmart - Fruitful Yield4.6(1400)

  $43.58
• 

  NOW Foods L- Tryptophan Powder

  Target4.5(153)

  $23.99
• 

  Best Naturals L-Tryptophan mg 60

  Target4.7(74)

  $9.99Lowest
• 

  Horbaach L Tryptophan 1500mg 180 Capsules

  Walmart - Carlyle Nutritionals, LLC4.8(30)

  $19.69
• 

  NOW L-Tryptophan 500 mg 60 Vegicaps

  lazyacres.com4.6(4600)

  $23.99
• 

  (2 pack) Now Foods L-Tryptophan 2 oz Powder, Size: 2.30

  Walmart - Fruitful Yield

  $41.84
• 

  Vitamatic L- Tryptophan 1000mg 120 Tablets

  Target4.7(331)

  $14.99

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.

• The Vitamin Shoppe

  4.4 (122)

  Vitamin & supplements store

  8929 Avenue D C1, Brooklyn, NY 11236

  Directions(718) 629-2076

• GNC

  4.3 (101)

  Vitamin & supplements store

  32 Graham Ave, Brooklyn, NY 11206

  Directions(718) 599-2887

• The Vitamin Shoppe

  4.3 (183)

  Vitamin & supplements store

  12 4th Ave, Brooklyn, NY 11217

  Directions(718) 858-8314

• GNC

  4.5 (53)

  Vitamin & supplements store

  2155 A Ralph Ave, Brooklyn, NY 11234

  Directions(347) 875-4578

• The Vitamin Shoppe

  3.9 (84)

  Vitamin & supplements store

  32 Court St, Brooklyn, NY 11201

  Directions(718) 596-0466

• GNC

  3.6 (113)

  Vitamin & supplements store

  1234 Fulton St, Brooklyn, NY 11216

  Directions(718) 622-1315

• GNC

  4.2 (118)

  Vitamin & supplements store

  56-18 Myrtle Ave, Ridgewood, NY 11385

  Directions(718) 417-7316

• The Vitamin Shoppe

  4.3 (142)

  Vitamin & supplements store

  1326 Kings Hwy, Brooklyn, NY 11229

  Directions(718) 382-2535

• Calcium-sensing receptor regulation of gastrointestinal hormone secretion

  J Anjom-Shoae, S Veedfald, AD Conigrave… - Endocrine …, 2026 - academic.oup.com

  … cations (9), and it is now understood to be critical to Ca2+ … or 1000 mg Ca2+ (as a solution of CaCl2), in both healthy lean … L-tryptophan on gut hormones and energy intake in healthy …

  2026

• Regulatory toxicity and safety profiling of N-acetyl-L-tryptophan with special emphasis on genotoxicity and male reproductive toxicity via intramuscular route of …

  R Kumar, N Gaurav, V Kumar… - Drug and Chemical …, 2026 - Taylor & Francis

  2026

• Quantitative studies on human urinary metabolites of tryptophan as affected by isoniazid and deoxypyridoxine

  JM Price, RR Brown, FC Larson - The Journal of Clinical Investigation, 1957 - jci.org

  … Although it is now known that kynurenic acid and xanthurenic acid cannot be regarded as … adequate to account for the majority of supplements of L-tryptophan. The results of the present …

  1957101 citations

• Losebig: An effective nutritional suplement to impove weight loss and mental health

  D Grigorakis, K Voutsadakis, G Kapoli… - Dialogues in Clinical …, 2025 - obrela-journal.gr

  … Metformin (dimethylbiguanide) is now considered the most … The doses ranged from 50 to 1,000 mg per day, administered for 2 to 6 … L-Tryptophan: Basic metabolic functions, behavioral …

  2025

• 3-Hydroxyanthranilic acid, one of L-tryptophan metabolites, inhibits monocyte chemoattractant protein-1 secretion and vascular cell adhesion molecule-1 expression …

  HO Pae, GS Oh, BS Lee, JS Rim, YM Kim, HT Chung - Atherosclerosis, 2006 - Elsevier

  … The in vivo transformation of l-tryptophan to kynurenine is … Apart from low level expression in healthy individuals, IDO expression is … We now asked whether HA would also induce HO-1 …

  2006109 citations

• Surowce naturalne mające znaczenie w profilaktyce i wspomagające leczenie depresji

  B Muszyńska, M Łojewski, J Rojowski, W Opoka… - 2015 - ruj.uj.edu.pl

  … of health problems, and also in case of serious diseases such as depression. Depression (affective disorder) now affects … L-Tryptophan, 5-hydroxy-L-tryptophan are present in the largest …

  201511 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-10-01. DSLD Label ID: 13500. 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.