Anti-aging or age reversal technology is already being researched and there are multiple breakthroughs recently. When do you think this will be a viable treatment?

Update: proposal to change the criteria to 

1- a treatment that slows aging significantly (2x+ slower)

2- a treatment that reverses aging one time (making patients 10y+ younger) this should be measurable through DNA aging. (telomers/DNA damage/non-functional cell percentage in tissues etc)

Treatments like skin care; or that make your body feel more energetic etc will not count. Living longer through healthy choices was always an option.  