If there’s anyone in the world who knows about the connection between the way you eat and the way you look, it’s the inimitable Dr. Robert Rey. The 51-year-old plastic surgeon and martial arts master sticks faithfully to what he calls a “Rey-modified Paleo diet,” which helps him achieve the face, body and energy of a man half his age. With a diet directed by medicine and nature, Dr. Rey has poured his knowledge into a heath and fitness book called Body by Rey, and on this episode of The Good Life, he brings that knowledge to bear on subjects like the truth about why diets fail; the high protein diet controversy; whether you should avoid fruit; and how dangerous really gluten is.