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• n  an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin

• In humans the amino acid L-tryptophan, which is converted to serotonin in the brain, is sometimes used as a sleeping pill.
• Researchers have been experimenting with tryptophan, the chemical from which the body makes serotonin.
• With every cell sucking in tryptophan from the blood, a shortage of tryptophan developed in the brain, where it has important uses.

• tryptophane

News & Articles

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• Doctor's Best Introduces Best 5-HTP
  Doctor's Best has introduced Best 5-HTP into its dietary supplement line. Scott Steinford, president of Doctor's Best, made the announcement. This product is available in 180 vegetarian capsules, each providing 100 milligrams of the amino acid 5-hydroxy-L-tryptophan (5-HTP). [PR.com]
  Sept. 5, 2013 - PR.com

Quotes

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• Brian Wilson in MLB.com
  I withheld on all the food,Wilson said. "I knew what calories I had to take. It's not like it's not fun for me. What's not fun is smashing garlic potatoes, eating a lot of tryptophan turkey, having squash souffle and then the feeling...
• Frank Caliendo in USA Today
  But the committee on medicines, whose remit is not to advise on USLs, has gone on to recommend that the tryptophan USL should be a tenth of the average therapeutic dose. This is totally illogical and contradicts the basis of working out USLs... Patrick Holford http://www.google.com/url?q=http://en.wikipedia.org/wiki/Patrick_Holford&source=dictionary&usg=AFQjCNHCno1HFVsNtERWIo5JKkSFA-18Xg NutraIngredients.com http://www.google.com/url?q=http://www.nutraingredients.com/news/news-ng.asp%3Fn%3D59429-uk-s-cautious&source=dictionary&usg=AFQjCNGpsiOwFLKUveo-iOOgimMa9CDitQ Apr 15, 2005 102397 135907 tryptophan On Fox on Thursday, comedian Frank Caliendo said, If you think tryptophan makes you sleepy, try watching four quarters of Bryant Gumbel."