Polyphenolics intestinal bacteria

The absorption of p-coumaric acid was shown in the rat gut after the feeding of spinach ceU walls with " C-labeled ferufic and p-coumaric acids to rats [32]. The two fi ee hydroxycinnamic acids were absorbed after release from the ceU wall in the cecum and colon, a finding that strongly suggested an involvement of colonic bacteria. In an in vitro smdy of the absorption of polyphenols using isolated small intestine from the rat, p-coumaric acid was absorbed to a higher extent than caffeic acid and to a lower extent than ferufic acid [25]. Glucuronidation of p-coumaric acid in the epithelium of the rat... 

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