What's up with Tyson's blood infusion- thingamajig?

https://www.thesun.co.uk/sport/11629...cell-comeback/
https://www.thesun.co.uk/sport/boxin...dio-stem-cell/


How much did that play into his physical transformation...and lets say if oh, Jarrell '4Time Aint Enough' Miller decided to get that done, would that be considered a form of preforming enhancement?

If more boxers began to undergo such a treatment?