MSP[RS] Resistant Starch is a natural source of resistant starch that has been proven effective in improving the state of the gut microbiota in swine.This supplement comes in a powder form that is easy to distribute, and can be easily thrown in with any type of feed mix. It can effectively be used at many critical times – birth, weaning, nursery weeks 1-3 and can be fed to lactating sows.MSP[RS] Resistant Starch works by increasing the population of healthy flora in the digestive tract. This increases the production of short-chain fatty acids, such as butyrate, which change the pH level in the digestive tract, making the environment unfavorable for pathogenic bacteria.