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Elite Edition

Who invented rennet?

Author

David Edwards

Published Apr 02, 2026

Who invented rennet?

29.5. It was accidentally made around 7000 years BC by an Arabian merchant during his long day’s journey as he put his supply of milk into a pouch made of a sheep’s stomach containing rennet, which became cheese and whey.

Where did rennet originally come from?

The coagulating property of animal rennet is thought to have been discovered when one of our forebearers transported his or her milk inside a vessel made from a dried calf or lamb stomach. In transit, the rennet from the stomach transformed the liquid milk into chunks of curd and watery whey.

How did humans discover cheese?

Cheese may have been discovered accidentally by the practice of storing milk in containers made from the stomachs of animals. Rennet, an enzyme found in a stomach of ruminant animals, would cause the milk to coagulate, separating into curds and whey.

Do humans have rennet?

In animals that lack rennin, milk is coagulated by the action of pepsin as is the case in humans. A commercial form of rennin, rennet, is used in manufacturing cheese and preparing junket.

What did the rennet do to the milk?

In transit, the rennet from the stomach transformed the liquid milk into chunks of curd and watery whey. This transformation made cheese what it is today – a nutrient dense food that travels well and can keep for years.

Where does rennet come from in the stomach?

Rennet /ˈrɛnɪt/ is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its key component, is a protease enzyme that curdles the casein in milk.

What kind of cheeses are made with rennet?

Suffice it to say that, throughout time, people have found many sources for coagulating their milk. Here at the shop, we have Spanish and Portuguese cheeses that use the cardoon thistle for coagulation, including Zimbro. Cheeses using vegetable rennet include Irish cheeses such as Cashel Blue and Ardrahan.

What is the origin of microbial rennet cheese?

Microbial rennet is derived from molds that are able to produce a coagulating enzyme and are viewed as vegetarian appropriate – however, they seem to have a reputation for occasionally engendering bitterness, especially in cheeses that are aged.

Rennet /ˈrɛnɪt/ is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its key component, is a protease enzyme that curdles the casein in milk.

What does rennet mean in the Vegetarian Journal?

Subscribe to the Vegetarian Journal. Rennet is defined as the inner lining of the fourth stomach of calves and other young ruminants or as an extract made from the stomach lining of a ruminant, used in cheesemaking to curdle milk. Rennet also broadly refers to any enzyme used for the coagulation of milk in the cheesemaking process.

What do you need to know about rennet in cheese?

Rennet also broadly refers to any enzyme used for the coagulation of milk in the cheesemaking process. The active component in rennet is known as rennin, the actual enzyme that causes milk to coagulate. This enzyme must be added to break down the proteins that keep milk in its liquid form.

How is rennet used to separate milk into curds?

Rennet can also be used to separate milk into solid curds for cheesemaking and liquid whey. In addition to chymosin, rennet contains other important enzymes such as pepsin and a lipase. Rennet is used in the production of most cheeses. The mammal’s digestive system must be accessed to obtain its rennet.