Bromelain is a protein-digestive enzyme found in pineapples. It minimizes the ignition of the molecules that activate the inflammatory process in the body. Studies have shown that it is effective alleviating the physical symptoms of mild knee pain and hip arthritis. It can be used to reduce inflammation from sprains and strains. Pineapples are also rich in vitamin C and manganese, which also play an essential role treating the symptoms of inflammatory diseases like osteoarthritis.