Protease PlusDiscover When taken with meals, Protease Plus acts to help digest proteins from the diet. Supports the digestive and immune systems. Activates macrophages and natural killer cells. Digests protein compounds. Provides plant derived trace minerals. How It Works How It Works Proteases are a type of digestive enzyme that break down proteins into smaller proteins and amino acids. Some proteases act in the stomach, and others are secreted by the pancreas