As for the fountain of youth search....

Quercetin (which will also get a delayed clinical trial to see if can treat Covid-19 virus like it treated Ebola virus)
and the leukemia drug
Dasatinib

are the interesting combo
that reduces “senescent cells” that build up as we age

https://www.sfgate.com/nation/article/Drug-cocktail-reduced-signs-of-age-related-13063962.php

Sample quote

Even in mice who were already well along aging’s path, the senolytic cocktail — a dose of the leukemia drug dasatinib and the dietary supplement quercetin — drove down senescent cells’ numbers, tamped down the inflammation they cause, and reduced the level of disability that comes with age-related diseases.
When given to younger mice in which the aging process was jump-started with a transfer of senescent cells, the anti-aging cocktail forestalled the onset of age-related diseases. And the anti-aging effects of a single five-day course of the cocktail lasted for months, the equivalent in humans of more than a decade.

End quote