A protease (also called a peptidase or proteinase) is an enzyme that catalyzes (increases reaction rate or "speeds up") proteolysis, breaking down proteins into smaller polypeptides or single amino acids, and spurring the formation of new protein products.

How do proteases function?

Protease refers to a group of enzymes whose catalytic function is to hydrolyze peptide bonds of proteins. They are also called proteolytic enzymes or proteinases. ... For example, in the small intestine, proteases digest dietary proteins to allow absorption of amino acids.

How does protease help digestion?

Proteolytic enzymes (proteases) are available as supplements that promote proper digestion of food. These enzymes also help regulate metabolic functions (such as helping to break down and digest protein into amino acids).