Double Strength L-Tryptophan 1000 mg

Amino Acids & Protein

Brand: NOW

Tablet or PillOff Market
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Net Contents

60 Tablet(s)

Serving Size

1 Tablet(s)

Servings Per Container

Not specified

Supplement Form

Tablet or Pill

Bar Code (UPC/SKU)

7 33739 00169 6

Product Version

Not specified

Suggested Use

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

Market Reference

$9.99 – $493.00· 18 listings
  • NOW Foods L- Tryptophan Double Strength 1000 mg 60 Tablets

    Walmart - iHerb4.6(1400)
    $22.07
  • Now Foods L-tryptophan 1000mg Tablets (60-Count)

    Walmart - Fruitful Yield4.6(1400)
    $43.58
  • Amazing Formulas L- Tryptophan 1000mg Tablets

    Walmart - Vitaminshub4.7(315)
    $9.99Lowest
  • Best Naturals L-Tryptophan mg 60

    Target4.7(74)
    $9.99Lowest
  • Amazing Formulas L- Tryptophan 1000 mg 120 Tablets

    Amazing Nutrition4.7(315)
    $19.99
  • NOW Foods L- Tryptophan Powder

    HerbsDaily.com4.5(153)
    $17.71
  • SuperSmart L- Tryptophan 1000mg per Day

    SuperSmart USA4.6(69)
    $36.00
  • Brieofood L- Tryptophan 1000mg per Serving 240 Capsules

    Target
    $18.99

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Research & Studies

  • Calcium-sensing receptor regulation of gastrointestinal hormone secretion

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

    … It is now known that the receptor undergoes repetitive … 500 or 1000 mg Ca2+ (as a solution of CaCl2), in both healthy lean … of L-tryptophan on gut hormones and energy intake in healthy …

    2026
  • Tolerable upper intake level for individual amino acids in humans: a narrative review of recent clinical studies

    R Elango - Advances in Nutrition, 2023 - Elsevier

    … supplements because of various perceived and real health benefits. However, currently, there are no recommendations set by national health … The data suggest that in relatively healthy …

    202364 citations
  • Over-the-counter sleep aid medications and insomnia

    S Randall, TA Roehrs, T Roth - Primary Psychiatry, 2008 - academia.edu

    … of untreated insomnia is now well documented. Beyond the … health services took valerian for 14 days to supplement their … insomnia, and L-tryptophan supplements have been used to …

    200818 citations
  • Cheating Death: The New Science of Living Longer and Better

    R McClain - 2023 - books.google.com

    … source for information regarding medical treatments for anti-… information about every medication, supplement, procedure, and … Now we give her an infusion of stem cells once or twice …

    20232 citations
  • A Momentary Lapse of Reason: Living with L-tryptophan Induced EMS and the Hidden Dangers of Genetic Modification of Our Foods

    H Behr - 2011 - books.google.com

    … L-Tryptophan has destroyed my health, my relationships, … presumed problems with L-Tryptophan supplements in general … I suggest you get angry now, right now, get very angry. Take …

    2011
  • Dietary supplements aimed at enhancing performance: efficacy and safety considerations.

    TJ Maher - The Role of Protein and Amino Acids in Sustaining …, 1999 - books.google.com

    … that resulted from the use of Ltryptophan, the US Food and … issue of long-term health and protein quality today, but one of … particularly because iron supplementation is now being carried …

    19991 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-10-25. DSLD Label ID: 26837. 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.