If it’s working by keeping cells dividing for longer then there was something else on TV the other day about ageing and mentioned something discovered a while back that can prevent cells from reaching finite cell division, but the major downside is the cells will then go on to develop into cancer cells. Reason being that cell division makes a copy of the DNA and increasingly errors are made.
Oddly it seems cancer cells defeat the limit making them theoretically immortal. Just that the cancer goes on to kill the host by wrecking the functions of the organs.
https://en.wikipedia.org/wiki/Hayflick_limit
(edit: my crude understanding from TV and Internet. I’m sure there’s way more to it than that, or likely bollox).