Another great bit of wisdom passed on from food author Michael Pollan is: "It's better to pay the grocer than the doctor."
During the sick-prone winter days, it makes a lot of sense to be protected with vitamins and anti-oxidants. Exercise keeps us strong. Get the right amount of sleep. Wash your hands thoroughly often. Sickness can be avoided or minimized.
This quote also applies to the bigger picture. Eating more healthy foods helps prevent serious diseases. It makes our skin and bodies look better, too.