Article: As a pain killer, tryptophan has been a sleeper

"Tryptophan is the first safe, nontoxic sleeping pill," asserts a University of Oklahoma professor in Nutrition News, a newsletter distributed in natural-foods stores.

The same newsletter quotes a psychiatrist who used tryptophan to combat the pain of repeated spinal surgery. "It relieved my pain and stress so well that I was able to function with complete efficiency," he said.

A Denver psychiatrist, says the newsletter, has used it on some 50 patients "to fight the blues or beat depression." His patients "all report happier lives."

These testimonials are anything but scientific, but they do have some basis in fact. Tryptophan has been shown to promote sleep. Whether the amino acid ...

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