Natural Support for Healthy Digestion. Natural Factors Bromelain capsules contain 500 mg of this incredible proteolytic enzyme isolated from the stem of the pineapple plant. Bromelain aids in digestion by breaking down protein into the various amino acids. Recent studies also show that Bromelain has many health promoting properties. Natural Factors only uses extra-strength Bromelain 1000 GDU (gelatin digesting units) and 1500 MCU (or milk clotting units) of enzyme activity per gram. Superior enzyme activity.