A protease is an enzyme that helps break down proteins into smaller peptides or amino acids. This process is essential for digestion, as it allows the body to absorb nutrients from the food we eat. Proteases are found in various organisms, including humans, animals, and microorganisms, and they play a crucial role in many biological functions. In addition to digestion, proteases are involved in cellular processes such as cell signaling and the regulation of the cell cycle. They are also used in various industries, including food processing and pharmaceuticals, to enhance product quality and develop new treatments.