Dr. Formulated Probiotics 100 Billion is the perfect combination for digestive and immune system health if you're a seasoned probiotic user searching for a powerful mix. It's a triple action composition. These probiotics, which are branded as "Extra Strength," are unique in that each serving not only contains 100 billion CFU of various strains, but they also include a prebiotic blend that encourages the growth of beneficial bacteria, which is crucial for maintaining a healthy microbiome. Additionally, a special postbiotic blend—also the good stuff—is included in Dr. Formulated Probiotics 100 Billion to support the growth of Bifidobacteria. All of this translates to one simple-to-swallow pill per day that provides potent triple-action daily support for immune system and digestive system health!