Maxxiprob Once-Daily Probiotic is the natural way to build and maintain optimal digestive and immune health. Maxxiprob features three type potent, clinically researched probiotics for a triple action that simply can’t be matched by the leading single-strain supplements. Probiotics are “friendly” bacteria that live in your intestinal tract, where they perform important function for balancing digestive and immune health. Unfortunately, probiotic levels can be depleted by diet, age, stress and medications. That can lead to digestive imbalance, and can have negative effects on immune function.