First it eliminates waste and then it heals the area. This is accomplished by nerve energy from the brain through the spinal cord and out to the body. If you take medicine to stop the natural elimination process, you slow healing. If you only remember one thing about health, it should be that the body heals itself. Oxygen is the most important source of energy to the body, not food.
Breathing deeply increases the body's intake of oxygen.
Avoid smoking, it kills more people than auto accidents. Avoid processed foods. Foods high in water are easier to digest and metabolize. Remember, you can go several weeks without food, but only several days without water and only several minutes without oxygen. The most important thing to know about exercise is that it increases the body's ability to utilize oxygen.