In plants, the tryptophan is produced endogenously where in animals the tryptophan used comes from diet.    From Wordnik.com.  [Enterprising chemistry majors at Georgetown] Reference

To make matters more interesting, tryptophan is present in many protein-rich foods, which have been found to prevent serotonin production.    From Wordnik.com.  [Lactose Makes You Sleepy?] Reference

Dairy foods contain tryptophan, which is a sleep-promoting substance.    From Wordnik.com.  [WebMD Health] Reference

Turkey contains a natural chemical called tryptophan, which we need to build proteins for our bodies.    From Wordnik.com.  [Livescience.com] Reference

Since indole-based amino acids such as tryptophan are found in most living organisms this test is rather useless.    From Wordnik.com.  [Quartermasters of Terror] Reference

The word "tryptophan" makes its annual journey into our vocabulary for a few days.    From Wordnik.com.  [Daily Norseman] Reference

Turkey - it's the most famous piece of tryptophan.    From Wordnik.com.  [CNN Transcript Mar 10, 2007] Reference

It's not a myth, milk actually has some tryptophan.    From Wordnik.com.  [CNN Transcript Mar 10, 2007] Reference

We're giving -- a little tryptophan in there, right?.    From Wordnik.com.  [CNN Transcript Nov 29, 2004] Reference

So tryptophan may help, but the sleep debt probably a bigger role here.    From Wordnik.com.  [CNN Transcript Nov 22, 2007] Reference

L-tryptophan has been marketed as a dietary supplement to aid with sleep.    From Wordnik.com.  [Aaron E. Carroll: Turkey Doesn't Make You Sleepy. It Really Doesn't!] Reference

Scientific evidence does support a connection between tryptophan and sleep.    From Wordnik.com.  [Aaron E. Carroll: Turkey Doesn't Make You Sleepy. It Really Doesn't!] Reference

But you know, it's funny because everyone blames the tryptophan in the turkey.    From Wordnik.com.  [CNN Transcript Nov 22, 2007] Reference

Still a little groggy from the turkey induced tryptophan and the football marathon.    From Wordnik.com.  [CNN Transcript Nov 27, 2006] Reference

All cereals are low in vitamins A, D, C, B12, and the amino acids Iysine and tryptophan.    From Wordnik.com.  [14. Wild Grains] Reference

You know, you think you may know because a lot of people toss around this term tryptophan.    From Wordnik.com.  [CNN Transcript Nov 22, 2007] Reference

The disease was caused by a contaminant that was present in the L-tryptophan preparations.    From Wordnik.com.  [Fatal Care]

It turns out that, in spite of calories and tryptophan, Thanksgiving is a healthy holiday.    From Wordnik.com.  [Stuffing: The Real Value Of Thanksgiving] Reference

The recommendations for tryptophan supplements to help you sleep are 500 to 1000 milligrams.    From Wordnik.com.  [Aaron E. Carroll: Turkey Doesn't Make You Sleepy. It Really Doesn't!] Reference

This protein had already been shown to be deficient in a chemical constituent known as tryptophan.    From Wordnik.com.  [The Vitamine Manual] Reference

These foods, by eliciting normal insulin secretion, increase the amount of tryptophan in the brain.    From Wordnik.com.  [Judith J. Wurtman, PhD: A Hidden Cause of Obesity] Reference

He is my orphan, and we will feed his tall, skinny frame until he passes out from tryptophan overdose.    From Wordnik.com.  [It's a GIRL!!!] Reference

Soon some of the patients taking L-tryptophan showed signs of a progressive, devastating neurologic disorder.    From Wordnik.com.  [Fatal Care]

Enjoy your turkeys and sleep well after the tryptophan kicks in, and I'll write more later. love, me last » next.    From Wordnik.com.  [nspblues Diary Entry] Reference

And if you have kids who are just bouncing off the walls, then why not try Heroin Jr., now with twice the tryptophan?.    From Wordnik.com.  [CNN Transcript Sep 29, 2006] Reference

With the addition of a chemical fraction, tryptophan, obtained from another protein, the rats lived, but did not grow.    From Wordnik.com.  [Northern Nut Growers Association, report of the proceedings at the eighth annual meeting Stamford, Connecticut, September 5 and 6, 1917] Reference

Whole wheat bread, a slice of toast with your tea and honey will release insulin, which helps tryptophan get to your brain.    From Wordnik.com.  [CNN Transcript Mar 10, 2007] Reference

But it's also certain elements of the brain like Tyrocine (ph) and hydroxy tryptophan that they're treating depression with now.    From Wordnik.com.  [CNN Transcript Dec 15, 2008] Reference