Some intriguing thoughts on the subject of reversing
aging, not just slowing it down, from the relatively recent Scientific American article linked below. It discusses the use of hypothetically possible changes in gene activity to achieve this.
The essence of the experimentation described in the article seems to be that: "New research suggests it is possible to slow or even reverse aging ... by tweaking genes that turn adult cells back into embryoniclike ones"
"The study adds weight to the scientific argument that aging is largely a process of so-called epigenetic changes, alterations that make genes more active or less so"
"... epigenetic reprogramming is the ultimate way to reverse aging"
"... even cells from human centenarians could eventually be rejuvenated"
However:"The study also showed how fine the line can be between benefit and harm. When the researchers treated mice continually, some developed tumors and died within a week"
The researchers in the discussion were from places like Harvard and the Salk Institute, so the approach seems to be taken seriously, and may even have merit, but it's clearly much more theoretical than practical at this point.
And what about
the entire matter of ethics? If it actually did become possible to reverse
aging in the population on a large scale, who would get to do it? All of us? Some of us? Who would decide?
It's perhaps worth noting that in science fiction writing and films, this theme of reversing the aging process has been widely treated, often as a morality tale, with some dire and unexpected consequence happening to those who try it. Such as is the case in Oscar Wilde's "The Picture of Dorian Gray."
Still, this approach could turn out to be one more avenue of research that might lead to significant coping possibilities in the matter of dealing with aging.
But If it actually did become possible for one to "de-age," and actually go back to really being, in actual fact, years (decades??!!?) younger, would you really want to do it?
Or should the "be careful what you wish for" admonition apply? https://www.scientificamerican.com/article/aging-is-reversible-at-least-in-human-cells-and-live-mice/