Not a new concept.
To be healthy, live healthy. Each of us that is trying to make positive change in our lifestyle is doing this. I certainly haven't got the market cornered on this.
I want to be a person who makes good choices in life, who makes mindful decisions about all kinds of things, including what I put in and on my body. I may not LOOK like a person who does this right now. I may be the "fat chick" giving advice that obviously hasn't gotten me thin (yet), but I will be.