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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: May 2020
  • Shipping Weight:
    0.11 kg
    Switch to Imperial units
  • Product Code: DRB-00126
  • UPC Code: 753950001268
  • Package Quantity: 90 Veggie Caps
  • Dimensions:
    6.1 x 6.1 x 10.9 cm , 0.09 kg
    Switch to Imperial units
  • Doctor's Best uses exclusively the Tryptopure brand of Tryptophan, manufactured by Ajinomoto of Japan.
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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

Product Thoughts

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

Works Great

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Ce produit est très bien.

Posted by iHerb Customer on Mar 25, 2017 | Verified Purchase

Je prends ce produit depuis trois ans et j'en suis très contente

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Excelent, effective

Posted by iHerb Customer on Mar 04, 2017 | Verified Purchase

I take this for OCD and anxiety, it works very well and doesn't make me as sleepy as 5-HTP. Because it has to be converted to 5-HTP by the body, the onset is about 2 to 3 hours from taking it, preferably on an empty stomach. When it kicks in, you notice a mild relaxing effect that peaks for about 1-2 hours and then fades away within 8 hours aprox.. I recommend taking it with L-Theanine for a more accentuated relaxing effect. Don't take too much, just 1 pill in the evening/night or 1 pill in the morning and 1 in the night.

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Unbroken sleep

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

Helps our sleep to be unbroken. And seems to help a lot with anxiety. We have a break for a month or two, between using up the bottle, as we don't seem to need to take it continuously, and our body's seem to prefer that.

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L-Tryptophan to Boost Serotonin

Posted by iHerb Customer on Feb 06, 2017 | Verified Purchase

I was experiencing anxiety so i decided to take l-tryptophan. Funnily enough my brain fog disappeared so it was good for that. But i found that it kind of made me feel a little too sedate. So ive decided to discontinue from using it. Not saying its a bad product, it just didnt work for me :(

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