The various uses of PRP therapy extend far beyond the knees of pro athletes. Initially evaluated as a post-cardiac surgery transfusion in 1987, it earned FDA approval in 2009 and later migrated north to the face — and, on one iconic occasion, all the way to Calabasas to one Kim Kardashian.

Injecting your own plasma back into yourself to make your joints stronger or your skin more youthful sounds like a move ripped out of a twisted comic-book villain’s playbook, but PRP therapy is increasingly popular for cosmetic purposes.