Resistant starch (resistant starch), also known as anti-hydrolysis of starch and starch digestion difficult and can not be digested in the small intestine, but in the human gastrointestinal tract in the colon can be volatile fatty acids from the fermentation reaction. Resistant starch is present in certain natural foods, such as potatoes, bananas, rice all contain resistant starch, particularly high amylose corn starch containing resistant starch up to 60%. Such starch biodegradable than other starches in the body and slow digestion, absorption into the blood and are relatively slow. Its nature is similar to soluble fiber, has a slimming effect, in recent years began to be favored by people want keep fit.
While most starches are broken down by your body into glucose, some starches, known as resistant starches, pass undigested into your colon. These starches function much like dietary fiber. They provide nutrition for the beneficial bacteria in your colon, keeping them thriving and healthy. There are four types of resistant starch. The first is found inside the indigestible cell walls of plants; the second is considered indigestible unless it is heated; the third is sometimes called retrograded starch, as long cooking times followed by a cooling period make them more difficult to digest; and the last is industrial resistant starch. This last type of starch is chemically modified and is not a natural starch.