Posted by iHerb Customer on May 27, 2008 | Verified Purchase
I bought both NOW and Doctor's Best powdered tryptophan, and found they work the same for me. I take about a teaspoon full at bedtime; not only do I get a great night's sleep but tryptophan helps a LOT with restless legs at night. I think that the fact that tryptophan is a precursor of melatonin is responsible for this. If I take straight melatonin it causes me to be very depressed; but the tryptophan does not. I have found all NOW products to be what they say they are and to work well.
I switched brands to this potassium because I could not find my regular one, and it works just fine. I take it to avoid cramps in my legs and feet.
Posted by iHerb Customer on Jan 27, 2008 | Verified Purchase
This is one of a very few products that made a tangible difference in herpes outbreaks; I can definitely tell the difference whether I am taking it. Highly recommended. The prescription meds do nothing for me, but high quality lysine and cat's claw (NOW brand) keep me in good shape.
I have been taking this supplement for years, based on blood tests that showed a deficiency. My doctor doses to correct the blood level to normal.
I've taken this product for quite some time to correct a deficiency. It seems to work fine.
This product is the best I have found for maintaining intestinal health.
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