As we make our New Year's resolutions, we often think about eating better, or trying exercise more, but often it is with some vague concept of what it takes to be healthy. We all know there are things we should do to stay healthy - but it is a little easier to follow our new standards if we can imagine our body having to manage everything we put in it.
Like the engine of your car would not run if you put sludge in it - better gas and the occasional flush makes it run better. It is the same for our bodies.
Health maintenance is about keeping the systems clean and working efficiently - and this also helps to keep the cancer away :)