Rennet cheeses are a type of cheese made by denaturing milk with rennet (a digestive enzyme). Rennet is found in large quantities in the stomach lining of calves.
There is also vegetable rennet, which is found in certain plant juices and tissues of plants and fungi. Since ancient times, fig juice has been a well-known substance that initiates the coagulation process of milk.
Today, synthetic rennet is also used.
