I can posit one reason for it not getting through trials easily.
The technology isn't "hard" per say, nor is it patented. You can find doctors willing to do "prolotherapy" procedures for you today.
The problem arises with trying to study it. I assume that they do phase 1 trials for therapies like this, which means that they have to find healthy individuals willing to get bone marrow removed, and then get that injected into joint spaces. Not many people want to sign up for that study, unfortunately.
The technology isn't "hard" per say, nor is it patented. You can find doctors willing to do "prolotherapy" procedures for you today.
The problem arises with trying to study it. I assume that they do phase 1 trials for therapies like this, which means that they have to find healthy individuals willing to get bone marrow removed, and then get that injected into joint spaces. Not many people want to sign up for that study, unfortunately.