Effect of a polyphenol-rich plant matrix on colonic digestion and plasma antioxidant capacity in a porcine model

Abstract

Altering cellular structure by reducing the particle size and applying heat may enhance the release of polyphenols from the plant cell matrix. The released polyphenols could ameliorate the impacts of a high-fat diet. Using a pig model in a 2 × 2 cross-over trial, we tested the effects of processing on the bioaccessibility of polyphenols in the diet, using low- and high-fat diets supplemented with raw and diced or cooked and pureed black carrots. Raw diced black carrots resulted in higher average particle size in the digesta of all gastrointestinal compartments and higher total and major short chain fatty acids in the descending colon. Supplementing the diet with raw and diced carrots also in..