Bravo Probiotics (MAF314) are the superior probiotics available - BY FAR!! They are a harmonious natural symbiosis of milk ferments and microorganisms that make GcMAF in your gut & helps restore your digestive & immune system. In extensive laboratory tests and publications it has proven to produce GcMAF in a completely natural way. The GcMAF Probiotic Bravo Yogurt Kit contains 42 essential probiotics to restore healthy gut function and digestion. These 42 strains of probiotic bacteria have proven to produce the essential protein, GcMAF. This specific protein is necessary for Vitamin D to work in the body and help activate the immune system.