FWIK he's quite openly admitted to not following a particularly healthy diet, because he got genetically lucky.

Imo he might be underestimating the effects of diet. Look at how different David Sinclair and him look ( apparent age wise ). Only 6 years difference. And look at how much less different they looked 10 years ago. Sinclair is of course endorsing the dietary role much more.

Then again, apparent age isn't everything...