Theres a man, Bryon Johnson who is a client of this sort of thing. His life reads like a Bond villain: rich billionaire with body dysmorphia issues who spends millions on it, now takes blood transfusions from his teenage son to feel young despite looking like an average person his age.
AFAIK, they didn't get any effect that they could measure. I think his bloodwork was already really good in the first place. If that's the case, then people don't need blood tranfusion to get healthy.
