L-Tryptophan 500 mg

Suggested Use

Suggested Usage: Take 1-2 capsules 2 to 3 times daily on an empty stomach; with final dose at bedtime; or as directed by your physician.

• 

  Now Foods L- Tryptophan 500mg 90 Veg Capsules

  Natures Food Markets4.6(4600)

  $17.99
• 

  Now L-Tryptophan

  NOW4.6(4600)

  $21.99
• 

  NOW L-Tryptophan 500 mg 60 Vegicaps

  Covenant Health Products4.6(4600)

  $21.99
• 

  (2 pack) NOW Foods L-Tryptophan, 500 mg, 60 Veg Capsules, Size: 4.35, Other

  Walmart - Fruitful Yield4.6(4600)

  $29.72
• 

  NOW Foods L- Tryptophan Powder

  Walmart - DailyVita4.5(153)

  $20.80
• 

  Nutricost L- Tryptophan Capsules

  Target4.6(1600)

  $15.95
• 

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

  Walmart - Fruitful Yield

  $41.84
• 

  The Vegan Shoppe L- Tryptophan 500mg 120 Veggie Capsules

  iHerb4.7(50)

  $36.99

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.

• Total Nutrition Atlanta

  4.8 (173)

  Vitamin & supplements store

  6597-G Roswell Rd NE, Sandy Springs, GA 30328

  Directions(404) 481-5263

• Progressive Nutracare

  4.5 (40)

  Vitamin & supplements store

  4646 N Shallowford Rd #6308, Atlanta, GA 30338

  Directions(678) 736-6363

• The Supplement Shop LLC

  5.0 (5)

  Vitamin & supplements store

  6700 Dawson Blvd, Norcross, GA 30093

  Directions(678) 725-0507

• Good Nutrition

  4.5 (243)

  Vitamin & supplements store

  2640 Beaver Ruin Rd #C, Norcross, GA 30071

  Directions(770) 409-8844

• The Vitamin Shoppe

  4.3 (145)

  Vitamin & supplements store

  1165 Perimeter Center W #360, Atlanta, GA 30338

  Directions(770) 396-7152

• Health Nut

  5.0 (35)

  Vitamin & supplements store

  3000 Old Alabama Rd #122, Alpharetta, GA 30022

  Directions(770) 663-4009

• Optimal Nutrition & Wellness

  4.6 (9)

  Vitamin & supplements store

  2296 Henderson Mill Rd #405, Atlanta, GA 30345

  Directions(404) 941-8625

• Discount Nutrition

  4.8 (59)

  Vitamin & supplements store

  1544 Piedmont Rd NE Ste 318, Atlanta, GA 30324

  Directions(404) 228-2712

• 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

  … and negative mood in healthy adult populations. We have targeted healthy adult men and … Now she works as an academic officer at LLC Okutoeru from 2018. Her research interests …

  2021109 citations

• Dose-related effects of calcium to enhance the effects of L-tryptophan on gut hormones and energy intake in obesity

  J Anjom-Shoae, PCE Fitzgerald… - The Journal of …, 2025 - academic.oup.com

  … by our recent observations in healthy individuals of normal … We have now demonstrated that these effects of calcium, in … and chronic dietary supplementation of calcium (∼1000 mg/day) …

  20253 citations

• DSHEA's failure: Why a proactive approach to dietary supplement regulation is needed to effectively protect consumers

  RE Nowak - University of Illinois Law Review, 2010 - papers.ssrn.com

  … unsafe dietary supplements, such as ephedra, Ltryptophan, and … effectively regulate dietary supplements because now, the FDA … that it poses a significant and unreasonable health risk.…

  201038 citations

• Health benefits of tryptophan in children and adults

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

  … This mini-review provides a brief overview of the role of L-tryptophan … It's now becoming clear that serotonin plays an important … trials suggest that L-tryptophan supplementation may be …

  201512 citations

• L-Tryptophan: Sources and Benefits

  L Does, TMY Sleepy - qualialife.com

  … that L-tryptophan has niacin equivalent activity in the body (ie, we can make NAD + molecules from it). L-tryptophan … not be considered medical advice. Please speak with an appropriate …

• 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

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2024-07-25. DSLD Label ID: 314454. 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.