RS1 represents starch that is resistant because it is in a physically
inaccessible form such as partly milled grains and seeds and in
some very dense types of processed starchy foods. It is measured
chemically as the difference between the glucose released by the
enzyme digestion of a homogenized food sample and that released
from a nonhomogenized sample. RS1 is heat stable in most
normal cooking operations and enables its use as an ingredient in
a wide variety of conventional foods.