Pepsin enzyme is a type of digestive enzyme. Enzymes in the stomach have a very important role in the process of digestion and absorption of protein in food. Lack or excess of the pepsin enzyme can cause digestive disorders. As soon as food enters the mouth, the stomach will produce stomach fluid. This liquid consists of water, mucus, electrolytes, digestive enzymes, and hydrochloric acid or also called gastric acid. This hydrochloric acid functions to change pepsinogen, a substance made by cells in the lining of the stomach wall, into the enzyme pepsin. Pepsin Enzyme Function The main function of the pepsin enzyme is to break down the structure of proteins present in food into amino acids. The body performs this process to facilitate the absorption of nutrients in the intestine. This protein breakdown process only occurs if the acid level or pH in the stomach is in the range of 1.5 to 2. The pepsin enzyme will not work if the stomach's pH is above 4. As a result of the exces...