Dude - one problem. MD's aren't God. While the quality of human life is getting better as we age, and more and more people can expect to reach their 80s, the biological fact is that human longevity tops out somewhere within long-accepted boundaries. More people may get closer to it thanks to medicine, but anyone who thinks we can suddenly double the human lifespan are smoking something...
...and the best way to live to 90 is..
eat a low-fat, high fiber diet, eat in moderation, don't smoke, don't drink to excess, exercise regularly, AND..
get your self a father and grandfather who lived to be 90....