Now featuring over 8 billion CFU of prebiotic, Forever Active Pro-B includes clinically studies prebiotics in a proprietary balanced blend of six strain to promote healthy digestion, enhance nutrient absorption and support immune function. These prebiotic strains were selected and engineered specifically for their ability to reach the intestines. Forever Active Pro-B is packaged in a unique vial to control moisture and protect the active bacteria strains, ensuring that you receive maximum benefits.