Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Cart Total:
Customers Also Bought:

iHerb Customer Reviews



Savings of: $15.78 (46% off)

Write a Review

Sorry, this product is no longer in stock.

  • Doctor's Best uses exclusively the Tryptopure brand of Tryptophan, manufactured by Ajinomoto of Japan.
  • Reviews | English
    Sort By

    Opposite effect

    Posted by Reviewer1333305 on Sep 01, 2012

    It's been awhile since I've taken the time to write a review, but I had to for this. I ordered this as a freebie to an order and have taken it 2 nights in a row after running out of my melatonin (Source Naturals 2.5 mg peppermint). It's now 4:00 am and I just unloaded the dishwasher! Not helping with sleep whatsoever, in fact it was hard to even fall asleep which I normally don't have a problem with, and I will not be taking these again (I thought maybe last night not sleeping was a fluke and decided to give them a 2nd chance). Can't wait for my melatonin to arrive!!

    Was this review helpful to you?

    Did not work

    Posted by AReviewer on Mar 28, 2014

    My dad used to take L-Tryptophan years ago to help him fall asleep. I saw it on iHerb and thought I would try it. For me, this product did not work. It did not help me fall asleep. I did not feel any drowsiness. I tried it for several weeks with no results, then discontinued it.

    Was this review helpful to you?


    Posted by Reviewer2923947 on Mar 02, 2011

    didn't work to put me to sleep.got drowsy but no sleep

    Was this review helpful to you?


    Posted by Reviewer1230830 on Jan 10, 2012

    could cause an upset stomach

    Was this review helpful to you?


    Posted by Reviewer1901077 on Feb 08, 2011

    Thank you for the very fast postage. I will be purchasing these again. Wonderful sleep aid. Thank you

    Was this review helpful to you?


    Posted by Reviewer2205020 on Oct 24, 2007

    top quality- top price

    Was this review helpful to you?

    Good Product

    Posted by Reviewer1050760 on Sep 29, 2010

    This is a very good product. Good quality Tryptophan. I give a 4 rating because it took a long time to get here. Got the package, in very good condition, on September 27th. The delay is probably at the border...Will buy again. Thanks, Joanne.

    Was this review helpful to you?

    Items 1-7 of 7 total