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A: The enzymes that break down protein include trypsin, chymotrypsin, pepsin, thermolysin, glutamyl endopeptidase, elastase, bromelain and papain. Trypsin, pepsin, elastase, thermolysin, glutamyl, endopeptidase and chymotrypsin are made in the human body. Bromelain comes from pineapples and papain comes from papayas.
Digestive enzymes such as amylase (carbohydrates), protease (proteins), lipase (fats), and cellulase (cellulose) break the molecular bonds in the food we eat. Digestive enzymes render the nutrients small enough to be absorbed into the bloodstream through the small intestines and assimilated by the body.