Pineapple is the only known source of bromelain a mixture of protein-digesting enzymes that research shows to aid in digestion and reduce inflammation. Bromelain has also shown to be helpful in treating arthritis, sinus congestion, surgical healing and inhibits growth of cancer cells. Pineapples are also loaded with vitamin c and manganese. Whenever possible buy whole because this ensures freshness and that nothing has been added. The easiest way I've found to eat fresh is to cut the top and bottom off, stand on one end and slice the sides off from top to bottom as you work your way around.