Ratio of acetate, propionate, and butyrate (respectively) produced in rumen

Range ~75:15:10 to 40:40:20 %
Organism Mammals
Reference Bergman EN, Energy contributions of volatile fatty acids from the gastrointestinal tract in various species. Physiol Rev. 1990 Apr70(2):567-90. abstract or p.567 right column 2nd paragraphPubMed ID2181501
Comments "The principal VFA [volatile fatty acids] in either the rumen or large intestine are acetate, propionate, and butyrate and are produced in a ratio varying from approximately 75:15:10 to 40:40:20. Absorption of VFA at their site of production is rapid, and large quantities are metabolized by the ruminal or large intestinal epithelium before reaching the portal blood...In all mammals examined, the anion form of acetic acid, or acetate, is the main VFA present. In fact, acetate usually is present in higher concentrations than all other organic anions combined. Propionate and butyrate also are present in large concentrations, although their amounts can vary considerably with diet. Commonly, molar ratios of acetate to propionate to butyrate are found to vary from ~75:15:10 to 40:40:20."
Entered by Uri M
ID 111242