Darrell Cockburn Assistant Professor of Food Science Pennsylvania State University Our interests center around the processing of dietary fiber by the human gut microbiome. This fiber is composed primarily of the undigested carbohydrates in our diet. Humans can really only directly use the polysaccharide starch (mostly, see below), the disaccharides lactose, sucrose and maltose and their constituent monosaccharides glucose, galactose and fructose. All other carbohydrates are untouched by human