Strengthening Immune Function: Understand Your Immune System

Our bodies must constantly defend themselves against microorganisms, cancer cells, viruses, and toxins. In battling these invaders, our immune systems ward off everything from the common cold to premature aging and serious illnesses. White blood cells, the major infection-fighting cells of the body, are able to engulf and destroy abnormal cells and foreign organisms. But these hard-working cells need help. Good eating habits can strengthen these immune defenses, while unhealthy foods can weaken them.