The following are selected published articles which address oats and gastrointestinal health.

Oat fiber reduces nutrient absorption rates by delaying gastric emptying
Johansen, H.N., Knudsen, K.E.B. Effects of reducing the starch content in oat-based diets with cellulose on jejunal flow and absorption of glucose over an isolated loop of jejunum in pigs. Br. J. Nutr. 72:717-729, 1994.

Soluble fiber in oats increases colonic fermentation in children
Brighenti, F., Casiraghi, M.C., Ciappellano, S., Crovetti, R., and Testolin, G. Digestibility of carbohydrates from rice-, oat- and wheat-based ready-to-eat breakfast cereals in children. Eur. J. Clin. Nutr. 48:617-624, 1994.

Oat fiber reduces energy, protein, and fat digestibility and increases colonic microbial activity in pigs
Knudsen, K.E.B., Jensen, B.B., and Hansen, I. Digestion of polysaccharides and other major components in the small and large intestine of pigs fed on diets consisting of oat fractions rich in beta-glucan. Br. J. Nutr. 70:537-556, 1993.

Consumption of lactobacillus strains in oatmeal soup increases bacterial growth within the intestinal mucosa
Johansson, M.-L., Molin, G., Jeppsson, B., Nobaek, S., Ahrne, S., and Bengmark, S. Administration of different lactobacillus strains in fermented oatmeal soup: in vivo colonization of human intestinal mucosa and effect on the indigenous flora. Appl. Environ. Microbiol. 59:15-20, 1993.

Oat bran, but not isolated beta-glucans, enhance colonic butyrate production in pigs
Knudsen, K.E.B., Jensen, B.B., and Hansen, I. Oat bran but not a beta-glucan-enriched fraction enhances butyrate production in the large intestine of pigs. J. Nutr. 123:1235-1247, 1993.

Intestinal microbial fermentation of oat fiber increases fecal losses of protein, fat and energy in pigs
Knudsen, K.E.B., and Hansen, I. Gastrointestinal implications in pigs of wheat and oat fractions. Br. J. Nutr. 65:217-232, 1991.

Oat bran fiber is more fermentable than wheat or corn fiber in rats
Mongeau, R., Yiu, S.H., and Brassard, R. Chemical and fluorescence microscopic analysis of fiber degradation of oat, hard red spring wheat, and corn bran in rats. J. Agric. Food Chem. 39:1966-1971, 1991.