Primal Defense® is an all-natural combination of 12 probiotic species and Homeostatic® Soil Organisms (HSOs), featuring the patented Poten-Zyme® process, for 3 billion active cells per day within a wholesome matrix! The HSO probiotic blend in Primal Defense aids in preserving a balanced inner ecosystem, aiding in normal gastrointestinal equilibrium, and makes the most of healthy diets by aiding in the normal absorption and assimilation of nutrients in the digestive tract.*