L-Tryptophan Powder

Amino Acids & Protein

Brand: NOW

PowderOff Market
Click to view full label

Net Contents

2 oz.; 57 Gram(s)

Serving Size

0.25 tsp [.5-1 g]

Servings Per Container

Not specified

Supplement Form

Powder

Bar Code (UPC/SKU)

7 33739 00263 1

Product Version

Not specified

Suggested Use

SUGGESTED USAGE: As a dietary supplement; take one or two 1/4 level teaspoons 2 to 3 times daily on an empty stomach; with final dose at bedtime; or as directed by your physician.

Market Reference

$5.30 – $699.99· 22 listings
  • NOW Foods L- Tryptophan Powder

    iHerb4.5(153)
    $22.03
  • (2 pack) Now Foods L-Tryptophan 2 oz Powder, Size: 2.30

    Walmart - Fruitful Yield
    $41.84
  • Now L-Tryptophan

    iHerb4.6(4600)
    $13.46
  • Now Foods L- Tryptophan 500mg 90 Veg Capsules

    PureFormulas.com4.6(4600)
    $16.96
  • Now Foods, L-Tryptophan, Powder, 2 oz (57 g)

    Silkrute
    $115.35
  • L- Tryptophan Supplement Powder

    Target4.9(119)
    $30.97
  • (2 pack) NOW Foods L-Tryptophan, 500 mg, 60 Veg Capsules, Size: 4.35, Other

    Walmart - Fruitful Yield4.6(4600)
    $29.72
  • NOW L-Tryptophan 500 mg 60 Vegicaps

    lazyacres.com4.6(4600)
    $23.99

Where to Buy Locally

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.

  • Supreme Nutrition Greenville

    5.0 (227)

    Vitamin & supplements store

    1143 Woodruff Rd Ste A-2, Greenville, SC 29607

  • GNC

    4.0 (55)

    Vitamin & supplements store

    404 Harrison Bridge Rd G, Simpsonville, SC 29680

  • The Vitamin Shoppe

    4.5 (147)

    Vitamin & supplements store

    1129 Woodruff Rd Ste E, Greenville, SC 29607

  • All Natural Health & Beauty Center

    4.6 (48)

    Vitamin & supplements store

    101 E College St, Simpsonville, SC 29681

  • Garner's Natural Life - Woodruff

    4.6 (105)

    Vitamin & supplements store

    1601 Woodruff Rd Suite A-B, Greenville, SC 29607

  • The Vitamin Shoppe

    4.5 (90)

    Vitamin & supplements store

    4839 Calhoun Memorial Hwy US 123, Easley, SC 29640

  • Garner's Natural Life

    4.6 (157)

    Vitamin & supplements store

    27 S Pleasantburg Dr #20, Greenville, SC 29607

  • GNC

    3.7 (74)

    Vitamin & supplements store

    101 Verdae Blvd #500, Greenville, SC 29607

Research & Studies

  • Role of tryptophan in health and disease: Systematic review of the anti-oxidant, anti-inflammation, and nutritional aspects of tryptophan and its metabolites

    RB Singh - World Heart Journal, 2019 - search.proquest.com

    … L-Tryptophan is an essential amino acid that is needed for the synthesis of proteins and … It is now becoming clear that GI tract serotonin plays an important role in the brain-gut-axis and …

    201958 citations
  • Analysis, nutrition, and health benefits of tryptophan

    M Friedman - International Journal of Tryptophan Research, 2018 - journals.sagepub.com

    … Here, tryptophan refers to l-tryptophan and the isomeric form produced during food … in the absence of l-tryptophan; ie, the mice must meet the entire need for l-tryptophan from the d-…

    2018398 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

    … 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
  • 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
  • Tryptophan: current status and future trends for oral administration

    LD Kaufman, RM Philen - Drug safety, 1993 - Springer

    … the ingestion of tryptophan (L-tryptophan)-containing products (… as these pose enormous public health threats to potentially … to EMS that are now being reported incorrectly as EMS. …

    199327 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

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2014-10-27. DSLD Label ID: 36998. 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.