Bromelain is a digestive enzyme derived from the stem and fruit of pineapples. Digestive enzymes break down the nutritional components of foods, making these nutrients available for the body's energy needs, cell growth and other vital functions required for optimal health. Enzymes are required by all living organisms to function properly and they exist in all life forms, including human, plants, bacteria and other organisms. They are naturally occurring proteins with the function to speed up the rate of chemical reactions within cells. They are essential for life and assist a wide range of important functions within the body.