Some foods that are rich sources of different enzymes are papaya, broccoli and pineapple. Pineapple contains bromelain, which is a proteolytic enzyme, as noted by the University of Maryland Medical Center. Papayas are high in papain, while broccoli and many other cruciferous vegetables are sources of myrosinase.
The enzyme bromelain, which is found in the stems and juice of pineapples, metabolizes proteins. Throughout many centuries, people in different areas of the world used this tropical fruit for conditions such as indigestion and inflammation, states the University of Maryland Medical Center.
The enzyme papain has many commercial uses, such as in meat tenderizers and as a stabilizing agent in the making of beer. Papaya's enzyme papain also metabolizes proteins and has uses that include treating indigestion, pain, inflammation, sore throats, ulcers, fever, diarrhea, insect bites and shingles. However, papain seems to possibly be effective for shingles, throat inflammation and sore throats based on limited studies, as noted by WebMD.
Cruciferous vegetables include broccoli, kale and cauliflower. These vegetables are good sources of the enzyme myrosinase and the compounds glucosinolates. When these two combine, it leads to the formation of isothiocyanates. Isothiocyanates are known to have anti-cancer effects that may destroy cancer cells and aid in the detoxification of carcinogens, according to Dr. Fuhrman's website.