<prompt> Short chain fatty acid produced by bacteria are maximally absorbed in:DuodenumColonIleumJejunum  <response>: Increasing attention is being focused on short-chain fatty acids SCFAs that are produced in the colon and absorbed from it. SCFAs are 25 carbon weak acids that have an average normal concentration of about 80 mmolL in the lumen. About 60 of this total is acetate, 25 propionate, and 15 butyrate. They are formed by the action of colonic bacteria on complex carbohydrates, resistant starches and other components of the dietary fiber, that is, the material that escapes digestion in the upper gastrointestinal tract and enters the colon.Reference: Ganongs Review of Medical Physiology T W E N T Y - F I F T H E D I T I O N page no 483 