The immune system extends throughout all body systems and is linked to our brain and affected by our state of mind. It protects us from bacteria viruses, and cancer cells. It may be the most important body system because a healthy immune system can meet all challenges.

To maintain immuno-respiratory health, pay special attention to eating fruits and vegetables and getting adequate exercise and rest. Vitamins A, C, B12, E, and beta carotene, and the minerals potassium, copper, iron, and zinc are especially helpful. Also helpful are ginkgo biloba, and antioxidants.