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Special, Doctor's Best, Best L-Tryptophan, 500 mg, 10 Veggie Caps (Discontinued Item)

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The item is currently out of stock and replenishment is unconfirmed.

Out of Stock - Discontinued
  • Product Code: FRE-00202
  • UPC Code: 753950002029
  • Package Quantity: 10 Veggie Caps
  • Dimensions: 1.5 x 1.5 x 2.7 in, 0.05 lbs (0.02 kg)

Product Overview

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

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

Take 1-2 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

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

Contains nothing other than listed ingredients.

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Supplement Facts
Serving Size: 1 capsule
Servings Per Container: 10 servings
  Amount Per Serving % Daily Value
Ajinomoto L-Tryptophan 500 mg
† Daily Value not established.

iHerb Customer Reviews

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Posted by TinVal on Aug 16, 2012

Tryptophan is a precursor to serotonin, a hormone contributing to the feelings of well-being, and people with low levels of serotonin are prone to depression. A study reported in the November 1982, "Psychological Medicine," investigated whether tryptophan could act as an antidepressant. The study involved 150 patients and lasted 12 weeks. It was found that tryptophan significantly improved depression and was not associated with side effects.

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17 people found the following review helpful

A Wonderful Supplement for Sleep

Posted by Reviewer2588465 on Mar 28, 2013

I've found that Tryptophan and Magnesium are what I've needed for a good nights sleep. I stopped waking up several times a night when I started taking these. I don't know if I'll ever stop waking up in the middle of the night completely, but these sure have helped. Try this free sample and give it a shot.

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2 people found the following review helpful

Does what it says it will.

Posted by Reviewer2930379 on May 14, 2012

It really helps to alleviate depression and control mood swings. I prefer it to 5-htp as it seems to last longer.

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2 people found the following review helpful


Posted by Reviewer1079869 on Jun 11, 2009

Make sure you take them a couple of hours before going to bed. Nice restful sleep with no hangover in the morning,

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2 people found the following review helpful

*****Calmed dog from thunderstorms*******

Posted by coconut on Jun 25, 2012

I enjoyed this sample so much I bought the regular size. My dog is easily upset and scared of thunderstorms. I don't like medicating him so after some research I tried this. He is more calm and I feel better that this is more natural than the meds his vet gave him.   I also have had relief from stressors such as work. I can take it at work and not have to worry about presciptions. It won't make you drowsy. Just less stress and better to cope.   Take on an empty stomach for best results!

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4 people found the following review helpful

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