This fruit is considered a natural heartburn remedy and effective digestive aid. This fruit contains the proteolytic enzymes papain and chymopapain, which are capable of digesting proteins, fats and carbohydrates. The enzymes from this fruit are commonly found in commercial digestive products for treating stomach ailments, including dyspepsia, liver and bile duct problems, improper fat digestion, and pancreatic disease. Furthermore, this fruit has been shown to reduce acid secretion and provide ulcer-protective effects in animal studies. What is this fruit?