Customer Reviews

Source Naturals, L-Tryptophan with Coenzyme B-6, 500 mg, 60 Tablets

$11.19
$19.98
Savings of: $8.79 (44% Off)
4.4 out of 5 based on 48 reviews
Write a Review
Customer Ratings
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Reviews 5-star
Sort by

Items 1-5 of 32 total

« Previous | 1 2 3 4 5 | Next »

Most Amazing Ever

6 people found the following review helpful

Posted by Reviewer1779793 on Sep 30, 2008

Purchased at iHerb

I have tried varieties of L-Tryptophan. Even one compounded by a pharmacist. This version with the Coenzyme B-6 is the most remarkable. I feel better quickly and sleep very well at night. It helps with daily stress and is perfectly safe. Eliminates many cravings for sugar and caffeine. A great investment in my health. Wouldn't be without it.

Was this review helpful to you?

Report abuse

Note: iHerb does not imply any medical claims from this review. Disclaimer.

Well designed formula

5 people found the following review helpful

Posted by Reviewer1331472 on Aug 17, 2010

Purchased at iHerb

The inclusion of B6 as p5p was a good choice in conjunction with tryptophan. The Dr. Best formula includes B3 as niacinamide (which is a known soporific agent), but having added my own niacinamide, I cannot perceive any difference. Melatonin is synthesized AFTER serotonin. The synthesis of serotonin (and other neurotransmitters) is catalyzed by a B6-dependent enzyme. Furthermore, B6 is required to manufacture Niacin from tryptophan. Thus a reason one might choose tryptophan over melatonin is NOT to skip any intermediary steps (there are a few studies showing that direct melatonin supplementation reduces levels of intermediary products). I use low-dose melatonin anyway (Same brand, sustained release) because sleep is scarce.

Was this review helpful to you?

Report abuse

Note: iHerb does not imply any medical claims from this review. Disclaimer.

L-Tryptophan Source Naturels

4 people found the following review helpful

Posted by Reviewer1889120 on Feb 10, 2011

Purchased at iHerb

My 25 year old son, who suffers from severe schizophrenia symptoms, probably caused by organophosphate poisoning at the age of 8, has been taking L-Tryptophan for 2 weeks and the change in him is remarquable. He has been confined to the house and his bed for years now we are out walking twice a day! The terror of passing people is diminished considerably and the overwhelming wish to die has gone. I hope it is going to last as we tried 5HTP last year with the same effect but it suddenly stopped working and he was thrown back into the hellish pit of schizophrenia.

Was this review helpful to you?

Report abuse

Note: iHerb does not imply any medical claims from this review. Disclaimer.

Much better than straight melatonin

2 people found the following review helpful

Posted by aRPiieS on May 26, 2011

Purchased at iHerb

Tryptophan is much better and much more consistent than melatonin in sleep support, act's much slower but much longer and does not give you same kind of night sweats. Melatonin knocks you out faster and harder but wears off in hour or two, max three. You also get benefits of serotonin and endorphin as your body manufactures also these from tryptophan. For me it is easier to get adequate tryptophan from pills than food at night as my metabolism turns on overdrive and goes through night if I eat too much heavily tryptophan laden food before bed time. Will buy again if there is still a need for sleep aid next time. P5P is a additional bonus on this one, iherb should take 90 or 120 pcs packages into lineup fast.

Was this review helpful to you?

Report abuse

Note: iHerb does not imply any medical claims from this review. Disclaimer.

Source Naturals, L-Tryptophan, 500 mg, 60 Tablets

1 person found the following review helpful

Posted by Reviewer1142452 on Feb 05, 2008

Purchased at iHerb

Its only been a short time but it seem to work well with no side affects.

Was this review helpful to you?

Report abuse

Note: iHerb does not imply any medical claims from this review. Disclaimer.

Items 1-5 of 32 total

« Previous | 1 2 3 4 5 | Next »

iHerbĀ® is a registered trademark of iHerb, Inc. Trusted Brands. Healthy Rewards. and the iHerb.com Trusted Brands. Healthy Rewards. Logo are trademarks of iHerb, Inc.


Disclaimer: Statements made, or products sold through this website, have not been evaluated by the United States Food and Drug Administration.
They are not intended to diagnose, treat, cure or prevent any disease. Read more »


Eco Friendly Initiatives