Resistant starch escapes degradation in the rumen. It provides a large supply of glucose provision. Read more about the function of resistant starch.Resistant starch is the starch that escapes degradation in the rumen. Non-resistant starch occurs when a portion of starch-rich feed materials is absorbed by the animal. After feed intake, the feed first enters the rumen. The micro-organisms in the rumen break down part of the starch. The broken-down starch is non-resistant starch. The other part escapes degradation in the rumen. This is the resistant starch. Resistant starch is broken down into glucose in the small intestine by its own enzymes and thus makes a greater contribution to the supply of glucose than non-resistant starch.