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Doctor's Best, Best L-Tryptophan, 500 mg, 90 Veggie Caps


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Doctor's Best, Best L-Tryptophan, 500 mg, 90 Veggie Caps

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Doctor's Best, Best L-Tryptophan, 500 mg, 90 Veggie Caps

In Stock
  • Expiration Date: 08/2020
  • Shipping Weight:
    0.24 lbs
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  • Product Code: DRB-00126
  • UPC Code: 753950001268
  • Package Quantity: 90 Veggie Caps
  • Dimensions:
    2.4 x 2.4 x 4.3 in, 0.2 lbs
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  • Doctor's Best uses exclusively the Tryptopure brand of Tryptophan, manufactured by Ajinomoto of Japan.
Frequently Purchased Together
    Product Overview


    • Science-Based Nutrition
    • Dietary Supplement
    • USP Pharmaceutical Grade
    • Featuring Ajinomoto's TryptoPure
    • Vegan
    • Non-GMO and Gluten Free
    • AjiPure Amino Acids

    L-tryptophan is an essential amino acid (protein building block) in human nutrition. Essential amino acids are not synthesized by the body and must be obtained in the diet. The L-tryptophan in this product is manufactured and tested for purity according to the Japanese Pharmacopeia (JP) and the United States Pharmacopeia (USP) standards.

    Suggested Use

    Adult Use: Take 1 or 2 capsules daily, or as directed by a health practitioner. For optimum absorption, take separately from protein-containing foods and dietary supplements containing protein or amino acids.

    Other Ingredients

    Modified cellulose (vegetarian capsule), cellulose, magnesium stearate (vegetable source), silicon dioxide.

    Contains nothing other than listed ingredients

    Supplement Facts
    Serving Size: 1 capsule
    Servings Per Container: 90 servings
      Amount per serving % Daily Value
    Ajinomoto L-Tryptophan 500 mg
    † Daily Value not established.
    iHerb Customer Reviews


    Posted by iHerb Customer on Nov 24, 2017 | Verified Purchase

    Excellent service. Noticed the difference in energy immediately

    Thanks for your feedback!

    Life Changer

    Posted by iHerb Customer on Oct 20, 2017 | Verified Purchase

    My 14 year old son almost never slept and was always grumpy .I was always edgy and kind of cranky ,we both started taking it about 3 months ago and everything is different. Deep sleeps and waking up kind of happy is the biggest changes .I don't fight to get out of bed and I don't have to fight to get him out of bed .will always be a monthly buy.

    Thanks for your feedback!

    No effect

    Posted by iHerb Customer on Oct 16, 2017 | Verified Purchase

    I take 2 capsules in the morning, and 2 in the evening. I tried taking it for 4 months, but I experiened no effect whatsoever. Nothing, nada.

    Thanks for your feedback!

    Not as helpful as I would have liked

    Posted by iHerb Customer on Oct 05, 2017 | Verified Purchase

    I have serious sleep issues, only relieved through the use of conventional sleep meds. The problem with them is that the longer you take them, the more you need to keep upping the dose as they become less effective and the more you become completely dependent on them. Therefore I began to look for something that would resolve this issue but wouldn't cause dependence. Among others, I discovered L-tryptophan, an ingredient in one of the other supplements I was trying and decided to try it on its own, hoping it would be more effective than what I was taking. i've been taking it now for several weeks and my experience has been, that it helps me to sleep longer hours; instead of getting up at 3:30, 4 am, i get up at 5:30, 6, and although I haven't been able to get off my sleep meds completely, I have been able to reduce the dose. The trick is finding the right dose and how to administer it; at this point, I'm taking 6; 2 each time, several times over the course of the evening. In summary, I feel that although they have allowed me to sleep longer hours, I have not yet been able to eliminate the need for conventional sleep meds which is my goal.

    Thanks for your feedback!

    Product Thoughts

    Posted by iHerb Customer on Apr 30, 2017 | Verified Purchase

    Works Great

    Thanks for your feedback!