User-edited article about tryptophan, one of the 20 standard amino acids, as well as an essential amino acid in the human diet.
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.
MedlinePlus Medical Encyclopedia: Tryptophan
Information about tryptophan, an essential amino acid necessary for normal growth in infants and for nitrogen balance in adults.
1997 article by John B. Fagan detailing how genetic engineering processes by a Japanese company produced impure tryptophan supplements that sickened people.
MedicineNet: Tryptophan - Oral Capsule
Consumer information about the medication tryptophan including its side effects, drug interactions, and recommended dosages.
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 Center.
Monograph about 5-Hydrotryptophan from the Alternative Medicine Review. Includes biochemical information, results of clinical studies, and contraindications.