Young blood transfusions could have been the goal of Saul & Bill with Cryonics for Teens & Twenties CTT. I've proposed this common sense idea in a few other cryonics spaces online and it's been roundly rejected. I stand by it however. Here's a search on the idea. Keep in mind Saul Kent started losing health at about the time the CTT conferences started. There has been no clear indication of what cause of his decline and death were and no list of symptoms, no medical report and no autopsy so I'm merely speculating based on some common sense connection of dots. I wonder what the downside side effects of young blood treatments have been and if we can compare them with Kent's symptoms. CPlatt would definitely know if Kent were doing young blood treatments.
https://search.yahoo.com/search;_ylt=Awr9Fqp..vRfNAsA6xuJzbkF?p=blood+transfusion+youth&fr=sfp&fr2=p%3As%2Cv%3Ai%2Cm%3Apivot&stype=web