The pancreas produces two types of proteases or enzymes that break down proteins: trypsin and chymotrypsin. Together with pepsin, a stomach enzyme, they break down protein into amino acids. In addition, proteases help keep the intestine free of pathogens like bacteria. People with protease deficiencies may experience irritability, mood swings, edema, and insomnia; recovery from infections such as those caused by bacteria and viruses may be slower because protease also digests impurities in the blood.

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