The immune system is the body’s defense against infectious organisms and other invaders. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade our body systems and cause disease. The immune system is made up of a network of cells, tissues, and organs that work together to protect the body. As we age, the body is less able to assimilate the nutrients required to maintain an optimal immune system and it is more necessary to make sure that our diet contains fruits and vegetables and that we take the right supplements. We have heard much about antioxidants that prevent cell oxidation and lower the occurrence of disease, aging and even cancer. They are important supporters of the immune system.