It is estimated that the human body consists of ten or so trillion cells. Almost all of these cells get turned over within approximately 100 days. That means we’re like a new person every three months. We reinvent ourselves physically. And since we’re physically made of air, water, and food—those are the only inputs—we are what we eat, literally and physically. In a sense our body has to rebuild itself every three months with the building materials we deliver to it through our stomach. Our mouths are
