Tryptofan is missing a few more processes/steps to wind up as seratonion of course the synthesis chart on the right of serotonin’s entry in wiki will show you. I assume you are looking for more of a relaxing type of substance instead of a sleepy maker? Niacin is some nice B Vitamin kind of stuff that tryptofan splits into also. However, it can cause problems for some.
B vitamins - Wikipedia
Tryptophan - Wikipedia
Niacin - Wikipedia
Melatonin - Wikipedia
Use as a dietary supplement
The primary motivation for the use of melatonin as a supplement may be as a natural aid to better sleep, with other incidental benefits to health and well-being due to its role as an antioxidant and its stimulation of the immune system and several components of the endocrine system.
Studies from Massachusetts Institute of Technology say that melatonin pills sold as supplements contain three to ten times the amount needed to produce the desirable physiologic nocturnal blood melatonin level for enhancement of sleep. Dosages are designed to raise melatonin levels for several hours to enhance quality of sleep, but some studies suggest that smaller doses are just as effective at improving sleep quality.[63] Large doses of melatonin can even be counterproductive: Lewy & al[64] provide support to the "idea that too much melatonin may spill over onto the wrong zone of the melatonin phase-response curve" (PRC). In their study, 0.5 mg of melatonin was effective while 20 mg was not.
Safety of supplementation
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Melatonin is available without prescription in most cases in the United States and Canada, while it is available only by prescription or not at all in some other countries. The hormone is available as oral supplements (capsules, tablets or liquid) and transdermal, the "melatonin sleep patch".
Sold as a dietary supplement in the USA, not as a drug, often in health food and other grocery stores and some drug stores, Food and Drug Administration (FDA) regulations that apply to medications currently are not applicable to melatonin.[2] Safety and efficacy of melatonin products may not be assessed.
Because of concerns of transmission of viruses through melatonin derived from animal sources melatonin derived from cow or sheep pineal glands should not be administered.[2][65]
Melatonin is practically nontoxic and exhibits almost no short-term side effects. No studies have as yet been conducted to determine whether there are any long-term side effects. There are, however, case reports about patients who have taken the supplement for years.
Ingesting melatonin supplements may cause some unwanted side effects, especially at high doses (~more than 3 mg/day): hormone fluctuations, irritability, increased sleep disturbances including vivid nightmares[2] and reduced blood flow (see below).
Exogenous melatonin normally does not affect the endogenous melatonin profile, merely advancing the phase of endogenous melatonin production in time if taken at an appropriate time of day.
In individuals with auto-immune disorders, there is concern that melatonin supplementation may exacerbate symptoms due to stimulation of the immune system.[66]
Melatonin can cause somnolence, and therefore caution should be shown when driving, operating machinery, etc. When taken several hours before bedtime in accordance with the Phase Response Curve for melatonin in humans, the dosage should be so tiny as to not cause tiredness/sleepiness.
Individuals who experience orthostatic intolerance, a cardiovascular condition that results in reduced blood pressure and blood flow to the brain when a person stands, may experience a worsening of symptoms when taking melatonin supplements, a study at Penn State College of Medicine\’s Milton S. Hershey Medical Center suggests. Melatonin can exacerbate the symptoms by reducing nerve activity in those who experience the condition, the study found.[67]
Blood–brain barrier - Wikipedia
Serotonin - Wikipedia Synthesis Chart on right
http://en.wikip edia.org/wiki/G … inobutyric_acid