DEAR DOCTOR K: Is it possible to prevent, or at least reduce, your risk of cancer?
DEAR READER: Absolutely, it is. It is possible both to reduce the risk that your cells will turn cancerous, and to catch cancer early and prevent it from causing suffering. But first let's define some terms. What does it mean to say that a "cell turns cancerous"? Cancer is uncontrolled cell growth. Most cells "grow" not by becoming larger, but from dividing. (An exception: Fat cells grow not only by dividing, but also by becoming larger.) One cell becomes two, two become four, four become eight, and so on.