I believe that aging is a disease. I believe it is treatable. I believe we can treat it within our lifetimes. And in doing so, I believe, everything … - David A. Sinclair

Another STAC is NAD, sometimes written as NAD+.39 NAD has an advantage over other STACs because it boosts the activity of all seven sirtuins.

Up until the second half of the twentieth century, it was generally accepted that organisms grow old and die “for the good of the species” — an idea that dates back to Aristotle, if not further.

What's the upward limit? I don't think there is one. Many of my colleagues agree.14 There is no biological law that says we must age.15 Those who say there is don't know what they're talking about. We're probably still a long way off from a world in which death is a rarity, but we're not far from pushing it ever farther into the future.