well.... The best nutrition in the world isn't going to save us. No matter what supplements we take we will still grow old, get feeble, and die.
As all of the scientists say, the healthier we are when the therapies arrive, the more effectively they will work and the more beneficial they will be to us. Proper diet, exercise and rest will not only result in a longer life, but will allow you to be MUCH healthier in your older age - mentally, physically, and emotionally. I would need a significant amount of hardcore credible evidence to change my views on this.
Unless you have severe risks factors going on our diet is not going to have a radically significant impact on our life spans. I had a great grandfather who was a coal miner is whole life, he ate what by what we know now, to be a very unhealthy diet, but he still lived to be over 100. That's good genes. If he had eaten the best diet in the world based on all the wonderful science we know today how much do you really think it could have impacted his life expectancy? A year or two maybe?
If de grey eats as he says and his biological markers are still good changing over to a radical longevity diet isn't going to have a huge impact. His science can.
Staying as healthy as you reasonably can does have an impact on our life spans and have a an impact as radically significant as the difference between Life and Death. People who eat healthy, exercising and rest properly throughout there lives are much healthier in their later years than those of people who lead unhealthy, sedentary, or stressful lives (or any combination of "unhealthy" choices).
de grey might ask you why you go to all the trouble to eat this perfect diet without bothering to do yourself or fund directly scientific research that could add quite a bit more than a few years to your life (perhaps more if you have specific issues to deal with).
De Grey is wrong on this issue. Going through the "trouble" of maintaining your health and living a healthy lifestyle is not as troublesome for as many people as you may believe. For many people making efforts to feel and be healthier physically, mentally and emotionally in the now makes more sense than "letting yourself go" in hopes of future technology one day finally making you a healthy individual again. It's still a long time before these therapies arrive and personally don't see a problem with wanting to stay healthy in the between time.
Remember in highschool or middle school days, some teachers started you out in the class with an 'A' average and told you all you had to do was maintain that grade. Most everyone starts out healthy, all we have to do is maintain that health.
I encourage you to investigate the benefits and importance of being reasonably healthy and the role it has on life in your middle and older years because eating bad, not exercising regularly, and not resting enough is doing a greater disservice to your overall wellbeing, in the now and in your future.
Sincerely,
Derek