Dude. Nobody has the slightest idea how to effectively treat "aging". The billionaires that engage in that fantasy might be pushing the state of the art a little bit, sure, but they do it from a starting position of absolute ignorance, and their efforts are mostly in vain.
It's like that old joke about a group of PMs that have "invented the general AI". Now all that's left to do is for some researchers and engineers to create it.