Citation

FDA 2001: Food and Drug Administration. Information Paper on L-Tryptophan and 5-Hydroxy-L-Tryptophan. Rockville (MD): Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Nutritional Products, Labeling, and Dietary Supplements; 2001. [Accessed 2007-08-02]. Available from: http://www.cfsan.fda.gov/~dms/ds-tryp1.html.