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  • Doctor's Best uses exclusively the Tryptopure brand of tryptophan, manufactured by Ajinomoto of Japan.
  • Customer Ratings

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    Reviews | English
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    L-Tryptophan 50 g

    Posted by Reviewer2888129 on Mar 02, 2009

    I wasn't paying enough attention when I ordered this product. Previously I've ordered from you, and used Doctor's Best L-Tryptophan Powder USP Pharmacetical Grade 100 grams. The price was similar, and I use a similar amount each night. Therefore, I am paying about twice as much for the new to me product. I hope that in the future you will again offer the 100-gram product.

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