The Nue Co Prebiotic and Probiotic is a vegan blend of 15 billion-spore dose probiotic and prebiotic inulin derived from 100% organic chicory root, which has been proven to help treat symptoms of IBS. Unlike live bacteria, which is often dead upon arrival, this room-temperature-stable blend doesn’t start working until it reaches your small intestine. The time-delay capsules are gentle on the stomach and derived from the bark of poplar trees.