L-Tryptophan

Other Combinations

Brand: Source Naturals

CapsuleOn Market
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Net Contents

30 Capsule(s)

Serving Size

1 Capsule(s)

Servings Per Container

Not specified

Supplement Form

Capsule

Bar Code (UPC/SKU)

0 21078 01983 1

Product Version

Not specified

Suggested Use

Suggested Use: 1 capsule three times daily; between meals and preferably with fruit juice. To support restful sleep; take 3 capsules before bed.

Market Reference

$9.79 – $124.50· 40 listings
  • L-Tryptophan Source Naturals

    iHerb4.6(1100)
    $21.81
  • Source Naturals L-Tryptophan with Coenzyme B-6

    Vitacost.com4.6(287)
    $20.55
  • Source Naturals Serene Science L- Tryptophan 120 Capsule

    Herbs Direct4.6(1100)
    $24.46
  • Source Naturals L- Tryptophan with Coenzyme B-6

    Herbs Direct4.8(72)
    $14.68
  • Best Naturals L-Tryptophan mg 60

    Target4.7(74)
    $9.99
  • Source Naturals L-Tryptophan 500mg

    PointBlank Nutrition4.6(1100)
    $19.99
  • Nutricost L- Tryptophan Capsules

    Target4.6(1600)
    $15.95
  • Horbaach L Tryptophan 1500mg 180 Capsules

    Walmart - Carlyle Nutritionals, LLC4.8(30)
    $19.69

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.

  • Vida Nueva Naturel Tienda Naturista (Originales).

    5.0 (12)

    Vitamin & supplements store

    1702 Montana Ave, El Paso, TX 79902

  • Omnilife Productos - Seytu Cosmetica

    5.0 (3)

    Vitamin & supplements store

    1401 Montana Ave # D, El Paso, TX 79902

  • The Vitamin Shoppe

    4.5 (92)

    Vitamin & supplements store

    8889 Gtwy Blvd E, El Paso, TX 79925

  • GNC

    4.3 (70)

    Vitamin & supplements store

    6101 Gateway Blvd W Ste A - 1, El Paso, TX 79925

  • Supplement Xpress

    4.8 (199)

    Vitamin & supplements store

    965 Resler Dr Suite#108, El Paso, TX 79912

  • X Nutrition Center

    4.7 (34)

    Vitamin & supplements store

    6974 Gtwy Blvd E Ste D, El Paso, TX 79915

  • Natural Vitamins & Herbs

    4.5 (6)

    Vitamin & supplements store

    6130 Montana Ave #107, El Paso, TX 79925

  • The Vitamin Shoppe

    4.2 (67)

    Vitamin & supplements store

    655 Sunland Park Dr J2, El Paso, TX 79912

Research & Studies

  • L-tryptophan and its deriviates in edible mushroom species.

    B Muszyńska, P Komendacki, K Kała… - Medicina Internacia …, 2014 - psjd.icm.edu.pl

    … So far informations about non–hallucinogenic indole compounds found in Basidiomycota species relate mostly to L–tryptophan which is the biogenetic precursor of all indole …

    201414 citations
  • Effect of different tryptophan sources on amino acids availability to the brain and mood in healthy volunteers

    CR Markus, C Firk, C Gerhardt, J Kloek… - …, 2008 - Springer

    … the sources. Whereas this notion is substantiated by the results from the natural TRP sources, … hydrolysate (HPROT) and intake of pure l-tryptophan. Moreover, only HPROT was able to …

    2008126 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 …

  • 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
  • Dietary L-Tryptophan Modulates the Hematological Immune and Antibacterial Ability of the Chinese Mitten Crab, Eriocheir sinensis, Under Cheliped Autotomy Stress

    C Zhang, Q Zhang, X Song, Y Pang, Y Song… - Frontiers in …, 2018 - frontiersin.org

    … , as ALP and ACP levels reflect the health status of aquatic animals (23, 46). In the present study, we observed that dietary supplementation with 0.70% L-trp significantly increased the …

    201825 citations
  • Problems with over-the-counter 5-hydroxy-L-tryptophan

    BL Williamson, K Klarskov, AJ Tomlinson, GJ Gleich… - Nature Medicine, 1998 - nature.com

    … the $11.75 billion per year natural medicine and dietary supplement industry, as noted … ulated by passage of the 1994 Dietary Supplement and Health Education Act; hence, their …

    199821 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-05-24. DSLD Label ID: 73847. 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.