Ray Kurzweil:
The average life expectancy was 30 in 1800; it was 48 in 1900; it’s now pushing 80. I predict that we’ll reach “longevity escape velocity” by 2029. Now, as you go forward a year, you’re using up a year of your longevity, but you’re actually getting back about three or four months from scientific progress. So, actually, you haven’t lost a year; you’ve lost eight or nine months. By 2029, you’ll get back that entire year from scientific progress. As we go past 2029, you’ll actually get back more than a year.
The 2030s will bring another health revolution, which my book on health (coauthored with Terry Grossman, MD) calls the third bridge to radical life extension: medical nanorobots. This intervention will vastly extend the immune system. Our natural immune system, which includes T cells that can intelligently destroy hostile microorganisms, is very effective for many types of pathogens—so much so that we would not live long without it.
The fourth bridge to radical life extension will be the ability to essentially back up who we are, just as we do routinely with all of our digital information. As we augment our biological neocortex with realistic (albeit much faster) models of the neocortex in the cloud, our thinking will become a hybrid of the biological thinking we are accustomed to today and its digital extension. The digital portion will expand exponentially and ultimately predominate. It will become powerful enough to fully understand, model, and simulate the biological portion, enabling us to back up all of our thinking. This scenario will become realistic as we approach the Singularity in the mid-2040s.
https://fortune.com/well/article/a-i-radically-lengthen-lifespan-ray-kurzweil/
Kurzweil himself takes 250 supplements every day, while closely tracking and monitoring about 50 different measures of his own health. At any given time, he knows his exact levels of cholesterol, HDL (high-density lipoprotein), LDL (low-density lipoprotein), triglycerides, homocysteine, and C-reactive protein, as well as his blood concentrations of various antioxidants and nutrients. “I haven’t aged much in the last 15 years,” he says.
https://www.lifeextension.com/magazine/2005/9/report_kurzweil
Alec's blog on health 
Leave a comment