What enzyme is produces by the stomach?

The enzyme produced by the stomach is called pepsin. Pepsin is a protease enzyme that breaks down proteins into smaller peptides. It is secreted by the chief cells of the gastric glands in the stomach. Pepsin is active in the acidic environment of the stomach, with an optimal pH of around 1.5 to 2.0. It works together with other enzymes such as hydrochloric acid and mucus to digest food and prepare it for absorption in the small intestine.