I am currently pursuing a commercially available 5 day Fasting Mimicking Diet (https://prolonfmd.com/) developed by the University of Southern California that purports to achieve the killing off of senescent cells in the body. One of their hopes it that it will achieve a rejuvenation effect. I have done 14 cycles of the 5 day FMD fasts so far over the past few years.
Research into the Prolon FMD is continuing, but if early results are upheld then it could achieve results such as show in this clip. 1 minute clip.