The role of dietary ß-glucan in glucose absorption and insulin secretion is not
known. Kinetics of absorption may impact the metabolic status following a
meal. Effects of dietary ß-glucan on glucose absorption and insulin secretion
were studied in three 35-kg pigs, surgically modified with catheters in the
portal vein and carotid artery and an ultrasonic flow probe around the portal
vein. It was found that oat ß-glucan as a soluble, viscous fiber decreases the speed of
glucose absorption and reduces peak insulin secretion; thus, dietary ß-glucan
in the long term improves carbohydrate metabolism. Specific fiber sources
thus not only serve as a nutrient, but may also affect absorption of other
dietary nutrients by the pig.