Cheese rennet is a natural enzyme that plays a crucial role in the cheese-making process. It is derived from the stomach lining of young calves, although there are also vegetable-based and microbial rennets available for vegetarian and vegan cheese production. When added to milk, rennet helps coagulate the proteins, causing them to separate into curds and whey. The curds are then further processed to create various types of cheese. Rennet is responsible for giving cheese its unique texture, flavor, and ability to melt. It is an essential ingredient in many traditional cheese recipes and is widely used in the dairy industry.