supplement to aid reparation of muscle tear

[japanallie]

Female personal trainer/ triathlete.. In, July 2008 I tore left hamstring muscles(semitendinosis and biceps femoris..) at the pelvic attachment point (Ishael tuberoscity)..all confirmed via MRI. I have had 2 steroid shots there in 6 months as the tears are not really successfully operable.. I continue to do cardio tho at a reduced speed and time. Stretching helps a lot, but its been over a year..

any ideas to speed or jumpstart healing via supplements? I'm 40.