This material is at the edge of my comprehension, but it seems that genetic variation is likely not directly relevant to this specifically. What appears to be

This material is at the edge of my comprehension, but it seems that genetic variation is likely not directly relevant to this specifically. What appears to be happening here is that gene activation patterns which work through methylation of DNA strands leave a kind of footprint behind over long periods of repeated gene activations. This is driven by gene activations which are required for basic biological function. If your genes are not being activated through methylation then you would have a range of problems with ordinary body function. It is possible that you might have generally reduced DNA methylation which could lead to slowed biological aging, but that would cause illness up front so the situation is kind of complicated.