Book excerpt: Prebiotics is defined as a selectively fermented ingredient that allows specific changes, both in the composition and/or activity in the gastrointestinal microflora that confers benefits upon host well-being and health. It explains the many avenues in which probiotics can be induced into our bodies, as well as the many types of bacterium composed in this product. This book encompasses the advances of Probiotics in health and food technology, exploring its beneficial effect on the health of our consumers.