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

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


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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
    Switch to Metric units
  • 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
    Switch to Metric units
  • 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 | Verified Purchase

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 iHerb Customer on May 27, 2012 | Verified Purchase

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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Amazing result

Posted by iHerb Customer on Apr 23, 2012 | Verified Purchase

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 iHerb Customer on Mar 25, 2012 | Verified Purchase

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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great sleeping aid

Posted by iHerb Customer on Feb 08, 2012 | Verified Purchase

I do not use this product every night only when needed....The times when I do use it does help with my sleeping to stay asleep longer.otherwise my sleep is broken up have been happy with the result and would buy again.when needed.Always extra happy also with the quick service through hassles online easy to order and pay .it is all good works for me great.Thankyou!!!!!

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