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† College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People’s Republic of China ‡ Guangdong Industry Technical College, Guangdong 510300, People’s Republic of China ...

Background—Populations at low risk of colonic cancer consume large amounts of fibre and starch and pass acid, bulky stools. One short chain fatty acid (SCFA), butyrate, is the colon’s main energy ...