You can already travel outside of the USA to get stem cells injected into your joints to regrow cartilage. I wouldn't do it because its largely unregulated and sketchy as fuck though. Maybe that will change in a few decades but not today. Archive: https://archive.today/40nM8 From the post: >>Scientists at Stanford Medicine have discovered a treatment that can reverse cartilage loss in aging joints and even prevent arthritis after knee injuries. By blocking a protein linked to aging, the therapy restored healthy, shock-absorbing cartilage in old mice and injured joints, dramatically improving movement and joint function. Human cartilage samples from knee replacement surgeries also began regenerating when exposed to the treatment.