Define Resistant Starch From the physiological perspective?

RS is defined as the sum of starch and products of starch degradation not absorbed in the small intestine of healthy individuals, Thus, starches can be subdivided into 'digestible' and 'indigestible' starch. The former may be hydrolyzed at a particular rate but nevertheless has an ideal digestibility of - 100%. On the other hand, indigestible starches (i.e. RS) have an ideal digestibility of less than 100%. RS can be further sub-classified into 4 classes. The four types of RS and the foods in which they are present are given in Table.

Table: Classification of resistant starch