Sometimes the best way to start is to help rid the body of damaging toxins. High orac value fruit can help with the process and one of the most trusted methods of detoxifying the body is to try an antioxidant cleansing like the Irwin Naturals 14-Day Acai Berry Cleanse.
Free radicals work at the molecular level to cause damage to your body. They describe things at work within your body on an atomic scale. While the action is very complex it can best be understood by a very simple explanation just to understand the basic issue.