- 5-HTP - Myth Or Miracle?
 - Explores the effectiveness of 5-hydroxy-tryptophan in treating anxiety and in regulating serotonin levels in brain and central nervous system. - 5-Hydroxytryptophan
(PDF) - Monograph about 5-Hydrotryptophan from the Alternative Medicine Review. Includes biochemical information, results of clinical studies, and contraindications.
- About.com: 5-HTP (5-Hydroxytryptophan): Check Before You Swallow
- Explains the aspects which need to be considered before consuming 5-HTP supplements.
- About.com: Is 5-HTP Safe for Depression?
- Precautions to be taken while using 5-HTP to treat anxiety and as dietary supplements.
- Depression-Guide: 5HTP
- Offers side effects, dosage, and benefits of 5-hydroxytryptophan and tryptophan, the alternatives to traditional antidepressants used to treat unipolar depression and dysthymia.
- FDA/CFSAN: Information Paper on L-tryptophan and 5-hydroxy-L-tryptophan
- 2001 report describing linkages between L-tryptophan and 5-hydroxy L-tryptophan and an outbreak of eosinophilia myalgia syndrome. From the U.S. Food and Drug Administration.
- Return of Tryptophan, The
- Overview of the amino acid which the body uses to create serotonin, a neurotransmitter that regulates appetite, sleep, mood, and pain levels.
- Tryptophan Summary
- 1997 article by John B. Fagan detailing how genetic engineering processes by a Japanese company produced impure tryptophan supplements that sickened people.
- UMM: 5-Hydroxytryptophan (5-HTP)
- Overview, uses, dietary sources, and precautions to be taken while using the 5-HTP dietary supplements. From the University of Maryland Medical Centre.
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