Papaya (Carica papaya) is a tropical tree. It contains a chemical called papain. Papain breaks down proteins, carbohydrates, and fats.
 
Papaya also contains a chemical called carpain, which seems to be able to kill certain parasites and might affect the central nervous system.

People use papaya for cancer, diabetes, dengue fever, HPV, and many other conditions.

Digestive enzymes are proteins that help you digest food. They are found naturally in the body. Most digestive enzymes are made by the pancreas. They help your body break down fats, proteins, and carbohydrates. When the pancreas doesn't make enough enzymes, the body can't easily break down foods and absorb nutrients. This is called malabsorption.

Malabsorption can lead to nutritional deficiencies and uncomfortable symptoms such as bloating, flatulence, abdominal cramps and diarrhea. Digestive enzyme supplements may help prevent this, but they also have many other purported uses. Proponents say they may help people with arthritis, autism, and even cancer.