It's within the realm of possibility. Parabiosis as a rejuvenation method has been slowly gaining attention since the 1970s and increasing credibility in the la

It's within the realm of possibility. Parabiosis as a rejuvenation method has been slowly gaining attention since the 1970s and increasing credibility in the last two decades. Research seems to indicate that the introduction of blood parts from the young->old reduces markers of aging in the old. See https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5662775/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5662775/ for a reasonable quick overview.