Critical step found in DNA repair, cellular aging (2017)
My humble opinion is that the cure for aging is going to involve creating some perfect stem cells for the body to regenerate from.  The idea is that you could perform an analysis on a few thousand cells from an adult, and since the mutations in each adult cell are in different places, by looking at the most common variant of each base pair you can figure out what the perfect original dna strand looked like.  Then you can create at least one perfect stem cell.  The reason I like this approach is that fixing mutations by comparing multiple dna strands is something that evolution can’t do, whereas if the problem was some simple chemical that the body needed, evolution would have solved that problem on its own. So I’m gonna go out on a limb and say that’s probably not going to work.