The Effect of the Undigested Fraction of Maize Products on the Activity and Composition of the Microbiota Determined in a Dynamic<i>in Vitro</i>Model of the Human Proximal Large Intestine

All fibers showed prebiotic activity in terms of increases in growth and/or activity of beneficial microbes. In addition, compared to the control, health-promoting metabolites were produced in higher amounts, while putrefactive metabolites were reduced for all fibers. The importance of the findings lies in the fact that the newly developed, maize-based fibers shift the intestinal environment to a healthier milieu, with increased health-promoting metabolites and health-beneficial microbes.