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Topic: Tryptophan

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In the News (Tue 18 Dec 18)

  Urban Legends Reference Pages: Turkey Causes Sleepiness
Turkey does contain tryptophan, an amino acid which is a natural sedative.
But tryptophan doesn't act on the brain unless it is taken on an empty stomach with no protein present, and the amount gobbled even during a holiday feast is generally too small to have an appreciable effect.
If tryptophan were truly the sandman's henchman, we'd be falling asleep at the wheel on our way home from KFC or McDonald's.
www.snopes.com /food/ingredient/turkey.asp   (638 words)

Tryptophan is an amino acid; one of the 20 found in the basic genetic code: codon UGG.
Tryptophan is a precursor for serotonin, melatonin, and niacin.
Tryptophan is produced by the human body, but can also be found in many sources of dietary protein, including chocolate, oats, bananas, dried dates, cottage cheese, red meat, fish, milk, peanuts, and most famously turkey.
www.iscid.org /encyclopedia/Tryptophan   (370 words)

Tryptophan is necessary for the production of the B-vitamin niacin, which is essential for your brain to manufacture the key neurotransmitter serotonin.
Tryptophan decreases amphetamine craving in animal studies and it may also have a role in alcohol withdrawal.
Although Tryptophan has a long history of safe use, in December 1989 the FDA reported over 600 cases of a flu-like syndrome associated with a blood abnormality in those taking the amino acid.
www.geocities.com /foxdarkangel/tryptophan.html   (447 words)

 Tryptophan   (Site not responding. Last check: )
Supplemental tryptophan is often the only accurate method of increasing one's blood levels of this essential amino acid.
Tryptophan also serves as the precursor to the nutrients niacin (B3) and picolinic acid.
Serotonin, a vital neurotransmitter influential in the regulation of mood and sleep, is equally dependant on the adequate intake of tryptophan.
www.supplementnews.org /tryptophan   (323 words)

 We Know: All About Tryptophan
Tryptophan (chemical symbol W, or Trp) is one of nine essential amino acids that the body does not make.
Tryptophan is one of the least abundant amino acids in the body and is obtained solely through food.
Because tryptophan is necessary for the production of serotonin in the brain, a calming agent, tryptophan deficiencies are likely to produce changes in sleep and increase anxiety and irritability.
www.ineed2know.org /health/tryptophan.htm   (356 words)

 Tryptophan Safe For Insomnia
Tryptophan can be used in treating depression, either by itself or in combination with antidepressant drugs like Prozac where it counters the insomnia side effect and prevents the need for increasing the dosage.
Tryptophan can also be combined with the B vitamin, niacinamide, for chronic pain or depression.
Tryptophan should not be taken by people who have hepatitis or other liver disease or by pregnant women.
www.truestarhealth.com /members/cm_archives13ML3P1A15.html   (690 words)

 L-Tryptophan - A sleep and anti-depression aid
Tryptophan is the precursor to Serotonin, a neurotransmitter in the brain, which is deficient in depression, and naturally enhances sleep.
Tryptophan, an essential amino acid, is the precursor to Serotonin, which is a necessary neurotransmitter responsible for transmitting nerve impulses in the brain, and inducing sleep and tranquility.
Tryptophan is very important for biochemical balance of the brain, and is very helpful for those with sleep deprivation, anxiety and mood enhancement due to low Serotonin levels.
www.cocoonnutrition.org /catalog/page_tryptophan.php   (1013 words)

Tryptophan is an amino acid and essential in human nutrition.
Tryptophan is also a precursor for serotonin (a neurotransmitter) and melatonin (a neurohormone).
Though tryptophan supplements are still banned from over-the-counter sale, properly produced pharmaceutical-grade tryptophan continues to be used legally as an essential nutrient in infant formulas and intravenous feeding and, in recent years, compounding pharmacies and some mail-order supplement retailers have begun selling tryptophan to the general public-sometimes as a supplement for "pets".
www.bipolarworld.net /Treatments/Alternatives/alt3.htm   (486 words)

 Bring Tryptophan Back (Feb/March 2006)
Tryptophan is one of the eight essential amino acids and is present in varying amounts in protein-containing foods.
Tryptophan is also converted in the body to niacin and picolinic acid, the latter of which appears to play a role in zinc absorption and transport.
Were tryptophan readily available to the public, it would compete successfully against some of the best-selling drugs on the market, including Prozac, Zoloft, Paxil, Celexa, and Ambien, perhaps reducing total annual revenues from the sale of these drugs by several billion dollars.
www.townsendletter.com /FebMar2006/gabyeditorial0206.htm   (750 words)

 Tryptophan   (Site not responding. Last check: )
Tryptophan is necessary for the production of niacin (B3) and requires B6, biotin, Vitamin C and zinc to form the enzyme needed for conversion.
Tryptophan is converted to 5-HTP (5-hydroxytryptophan) and then to serotonin, known to be deficient in those depressed and suicidal.
Tryptophan that is not converted to niacin or serotonin remains largely bound to albumen in the blood.
www.innvista.com /health/nutrition/amino/tryptoph.htm   (938 words)

 L-Tryptophan - The Way Up
However, to insure adequate levels of tryptophan in the brain it may be necessary to supplement tryptophan as a free form amino acid.
Tryptophan is used as a natural treatment for depression, insomnia, anxiety, carbohydrate craving or other states of disordered appetite, chronic pain states, obsessive and compulsive disorders, compulsive behaviors, PMS, alcoholism, other addictive states, and aggression.
Part of tryptophan is converted to Vitamin B3, so to ensure greater conversion to serotonin, it is important to be taking a Co enzyme B complex daily during the morning.
www.thewayup.com /products/0358.cfm   (649 words)

 Complementation in tryptophan synthesis
Auxotrophic mutations that require tryptophan for growth were tested for their ability to grow on a series of known precursors for the biosynthesis of tryptophan.
The overall pathway of tryptophan biosynthesis in Neurospora is chorismate --> anthranilate --> phosphoribosyl anthranilate --> 1-(o-carboxyphenylamino)-1-deoxyribulose-5-phosphate --> indoleglycerol phosphate --> tryptophan.
Plants with mutations blocking any steps in the pathway between anthranilate and tryptophan can thus grow in the presence of 5-methylanthranilate when also supplied with small amounts of tryptophan, whereas those that are not blocked will make enough 5-methyltryptophan to inhibit growth even in the presence of the small amount of added tryptophan.
www.colorado.edu /MCDB/MCDB2150Fall/notes00/tryptophan.html   (564 words)

 L-Tryptophan.org - A natural sleep aid and depression remedy!
Deficiency of tryptophan in the diet enhances the progress of the vitamin-deficiency disease pellagra, which is treated by restoring nicotinic acid to the diet, usually supplemented with tryptophan.
Tryptophan is a precursor for serotonin (aneurotransmitter), melatonin (a neurohormone), and niacin.
Tryptophan, found as a component of dietary protein, is particularly plentiful in chocolate, oats, bananas, dried dates, milk, cottage cheese, meat, fish, turkey, chicken, sesame and peanuts.
www.l-tryptophan.org   (399 words)

 [No title]
Tryptophan is an essential amino acid used to make niacin, the neurotransmitter serotonin, and the hormone melatonin.
Tryptophan has an antidepressant effect, and is essential for mood control and normal sleep patterns.
Tryptophan is used to treat migraines and reduce heart and artery spasms.
www.lycos.com /info/tryptophan.html   (759 words)

 A Blog Around The Clock : Does Tryptophan from turkey meat make you sleepy?   (Site not responding. Last check: )
The amino-acid tryptophan is a precursor of neurotransmitter serotonin which in turn is the precursor of hormone melatonin.
High levels of tryptophan in turkey meat and some other foods lead to increase in synthesis of melatonin in the intestine which results in more melatonin leaking from the GI tract into the bloodstream.
Tryptophan uses the aromatic amino acid transporter system and if there is a higher ratio of tryptophan in the blood stream with regards to other substrates ot the transporter (phenylalanine and tyrosine).
scienceblogs.com /clock/2006/11/does_tryptophan_from_turkey_me.php   (1994 words)

 WHFoods: tryptophan
Tryptophan is one of the 10 essential amino acids that the body uses to synthesize the proteins it needs.
Because of this, some healthcare practitioners believe that food sources of tryptophan do not cause a significant enough increase in blood levels of tryptophan to produce therapeutic results, and that tryptophan must, therefore, be taken as a supplement to increase its blood levels.
Tryptophan is still available, however, for use in the manufacture of infant formulas and entereral and parenteral (intravenous) nutritional supplements prescribed by physicians.
www.whfoods.com /genpage.php?tname=nutrient&dbid=103   (1350 words)

 Tryptophan - Herbs & Supplements - Drug Library - DrugDigest
Tryptophan is well known for antidepressant effects, because it converts into serotonin in the body.
Whether the high tryptophan levels are a cause of the condition or a result from it are unclear.
Blood levels of tryptophan fall during intense dieting, and the resulting serotonin imbalance may contribute to eating disorders such as anorexia nervosa.
www.drugdigest.org /DD/DVH/HerbsWho/0,3923,4031|Tryptophan,00.html   (695 words)

 The Analyst - Internet Health Report: Condition: Vitamin B6 Requirement
B6 is a cofactor for the conversion of tryptophan to serotonin and for the synthesis of dopamine and norepinephrine.
Tryptophan is converted to serotonin, a known bronchoconstricting agent in asthmatics.
Pyridoxine may also be of direct benefit to asthmatic patients, since it is a key cofactor in the synthesis of all the major neurotransmitters.
www.digitalnaturopath.com /cond/C77145.html   (2714 words)

 [No title]
In the presence of excess tryptophan, TRAP binds to the 5' leader region of the nascent trp mRNA, facilitating formation of a transcription terminator, which halts transcription prior to the structural genes.
Tryptophan synthetase (TSase),1 or synthase (EC), is present in all organisms that have the ability to synthesize tryptophan.
Since serotonin is a neurotransmitter implicated in numerous psychiatric and neurologic disorders, dietary tryptophan supplementation has been investigated as a possible treatment for a number of conditions attributed to alterations of serotoninergic neurotransmission.
www.lycos.com /info/tryptophan--l-tryptophan.html?page=2   (766 words)

 Vidyya Medical News Service   - Today in Vidyya   
Tryptophan, known for its presence in turkey and commonly blamed in the media for creating the sluggish after-meal sensations experienced by many Thanksgiving diners, is a metabolic precursor to the chemical messenger known as serotonin.
Researchers lowered the level of tryptophan in the volunteers' bodies, and memory tests showed impairment in their ability to recall and recognize words they learned during, but not before, the tryptophan depletion time period.
The results also showed that tryptophan depletion induced mood depression in half of the subjects who had a family history of depression but in only 9 percent of those with no family history of depression.
www.vidyya.com /vol4/v4i325_1.htm   (444 words)

 Howstuffworks "Is there something in turkey that makes you sleepy?"
Tryptophan helps the body produce the B-vitamin niacin, which, in turn, helps the body produce serotonin, a remarkable chemical that acts as a calming agent in the brain and plays a key role in sleep.
That was the conclusion that led many people to begin taking a dietary supplement of tryptophan in the 1980s as a way to treat insomnia, but the U.S. Food and Drug Administration banned tryptophan supplements in 1990 because of an outbreak of eosinophilia-myalgia, a syndrome that causes muscle pain and even death.
The tryptophan in a Thanksgiving turkey has to vie with all the other amino acids that the body is trying to use.
home.howstuffworks.com /question519.htm   (342 words)

 L-tryptophan Alternative Medicine Review - Find Articles
L-tryptophan (tryptophan; Trp) is a large neutral amino acid essential to human metabolism because it is the metabolic precursor of serotonin (a neurotransmitter), melatonin (a neurohormone), and niacin (vitamin B3).
Tryptophan's primary mechanism of action is its role as the metabolic precursor of the neurotransmitter serotonin.
(21) Tryptophan's role in PMS may be attributed to the increased activation of tryptophan catabolism to kynurenine during the luteal phase of the menstrual cycle.
findarticles.com /p/articles/mi_m0FDN/is_1_11/ai_n16126569?lstpn=article_results&lstpc=search&lstpr=external&lstprs=other&lstwid=1&lstwn=search_results&lstwp=body_middle   (768 words)

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