Pineapple has been used by many people for centuries as a folk remedy for numerous ailments, particularly digestive problems. Modern research has shown that bromelain, an enzyme found in both the stem and the fruit of a pineapple, may be where pineapple gets many of its health benefits. Pineapple contains substantial amounts of both vitamin C and manganese, so eating pineapple can help strengthen bones, relieve cold symptoms, aid digestion, and stop diarrhea.
A cup of fresh pineapple chunks contains 73% of the manganese the body needs for the day. Manganese, a trace mineral, is needed to build bone and connective tissues. A recent study found that a combination of glucosamine, chondroitin sulfate, and manganese offered significant improvement of symptoms for people with mild to moderate osteoarthritis of the knee.