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Doctor's Best, Best L-Tryptophan, Tryptopure, Enhanced with Vit. B6 & Niacinamide , 500 mg, 90 Veggie Caps (Discontinued Item)


Out of Stock - Discontinued
  • Shipping Weight: 0.3 lbs
  • Product Code: DRB-00161
  • UPC Code: 753950001619
  • Package Quantity: 90 Veggie Caps
  • Dimensions: 2.4 x 2.4 x 4.3 in, 0.25 lbs
  • Doctor's Best uses exclusively the Tryptopure brand of tryptophan, manufactured by Ajinomoto of Japan.
Product Overview


  • Science-Based Nutrition
  • USP Pharmaceutical Grade
  • Featuring Ajinomoto's TryptoPure
  • Dietary Supplement

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. Vitamin B6 is an essential cofactor in the conversion of tryptophan, while niacinamide plays an important role in allowing our body to properly utilize this essential amino acid.

Suggested Use

1 or 2 capsules daily. For optimum absorption, take separately from protein-containing foods and dietary supplements containing protein or amino acids.

Other Ingredients

Vegetable capsule, cellulose, magnesium stearate (vegetable source) and silicon dioxide.

Suitable for vegetarians

Contains nothing other than listed ingredients

Supplement Facts
Serving Size: 1 capsule
Servings Per Container: 90 servings
  Amount Per Serving % DV
Niacin (as niacinamide) 20 mg 100%
Vitamin B6 (from 17.6 mg pyridoxal 5-phosphate) 10 mg 500%
Ajinomoto L-Tryptophan 500 mg
†Daily Value not established.
iHerb Customer Reviews

doenst work for me

Posted by Katarinatan on Jun 13, 2012

I read all the wonderful reviews and wanted this to work badly for me. I have sleeping disorders: I cant fall asleep and I dont stay asleep for long. But unfortunately it didnt do anything for me.

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Posted by 4942381287721875683 on May 27, 2012

Completely ineffectual for me. Mindful relaxation prior to sleep is the best thing for me to have some success in reducing my sleep onset

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Posted by bruegger on May 04, 2012

perhaps too early to say but so far experience has been good, if you want a product which is slow acting, and accumulating, then this is one for you. because tryptophan is a protein it has to be broken down, perhaps this is why you can't really feel the effects right away, it doesn't knock you out, but it definitely keeps you well rested through the night, as the proteins are broken down and helps you sustain a good night sleep. did not work very well

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Amazing result

Posted by Reviewer2384638 on Apr 24, 2012

Two of these and I am OUT. Most immediately effective supplement I've ever taken.

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really effective, no side effect

Posted by Reviewer2179366 on Apr 09, 2012

I feel sleepy in a natural way by taking this medicine. I can sleep more than 7 hours and refreshed in the morning. I don't feel any side effect.

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