i read somewhere that the east germans used tBol for rapid healing of tendons... but some of their olympic-level athletes were using excessive dosages, so it's tough to say.
pretty much stay away from straight DHT while you're healing.
I don’t know about repair but there is definite relief. My knees have bothered me the last few years. I’m running NPP now and feel 100%. No stiffness or pain whatsoever.