The uncle I talk to most at family gatherings had the Platelet Rich Plasma treatment for his knee. 4 months later, he was really, really pleased with the results.
He is a life long cattle farmer, who also suffered from overuse/abuse. No super tramatic, acute injuries or anything. He’s a farmer, so you know he was careful before he spent his money, and wouldn’t B.S. about the results.
I don’t know specifically if he used the IRAP treatment or not. I’ll ask, but I’ll need to go through a couple relatives. But if it’s good enough for race horses, it’s probably cool.