The immune system is responsible for fighting infection by producing white blood cells and antitoxins. The immune system is the body’s defense against agents such as bacteria and viruses. It includes the lymph nodes, spleen, bone marrow, and white blood cells, among others. Support your immune system against unwanted invaders with Healed People, Heal People supplements, Immune system supplements help support the body in fine-tuning its natural defense mechanisms and maintaining an environment favorable to good health.