Probiotics: A Clinical Guide

Martin H. Floch, MD; Adam S. Kim, MD

Chapter 6: Nutrients To Nourish The Organisms: Prebiotics And Fiber (continued)

Harry J. Flint, BSc, PhD; Sylvia H. Duncan, BSc, PhD

A significant proportion of dietary intake remains undigested during passage through the stomach and small intestine, and becomes available as a source of energy and nutrients to the microbiota that colonize the large intestine. While many microorganisms can also be supported by energy sources of endogenous origin (host secretions, especially mucin, and sloughed epithelial cells), the species composition and density of the colonic community is profoundly influenced by the energy supply from dietary residue.1,2 Research has only recently started to reveal exactly how different dietary…