How about you think about what you just said for a minute. How is this a situation of "nothing to lose"? You are talking about an extremely sick person who, based on the fact that he has extremely advanced heart disease, probably has a lot of difficulty just being there for his family, and trying to put his affairs in order. Do you think he has the time and capacity to go on an "extreme diet" on the strength of "why not"? And if I publish some book which says that hitting oneself on the head with a pillow 100 times will cure heart disease, should he then try that? After all, what has he got to lose, right?