Serrapeptase – also known as serrapeptidase, serratiopeptidase and serratia peptidase – is a powerful proteolytic enzyme derived from a species of bacteria originally found in the intestine of silkworms. The bacterium, Serratia mercesans, produces the enzyme serrapeptase to enable the silkworm to dissolve its silken cocoon and emerge as a moth after metamorphosis. Serratia is now grown in cultures to produce serrapeptase by fermentation.

Enteric coating is a layer of protective coating for dietary supplements that is meant to allow the supplement to bypass digestion by the stomach and be absorbed in the small intestine. Systemic enzymes are proteins, so their functional structures are denatured (or destroyed) in conditions of extreme pH and temperature. Without enteric coating, enzymes would be rendered useless long before they reach the bloodstream, where their carry out their beneficial effects.