Here’s a good overview of what Google, Thiel and others are doing. I wish they’d stop calling it “immortality,” though. That’s not the goal, and if it were, it would be unrealistic. It’s just indefinite lifespan. As I often notes, expansion into space and extended lifespan go hand in hand.
Even short-term consumption of a Paleolithic-type diet improved glucose control and lipid profiles in people with type 2 diabetes compared with a conventional diet containing moderate salt intake, low-fat dairy, whole grains and legumes.