Excerpts from Bender, Arnold E. 1990. Dictionary of Nutrition and Food Technology. Butterworths, Boston.
Pigment in urine derived from the bile pigments, which, in turn, are formed from haemoglobin. When urine is left to stand, the urobilinogen is oxidized in air to urobilin.

Modified and compiled for the FOOD RESOURCE, Public Health and Human Sciences, Oregon State University
Updated: Tuesday, July 3, 2012.