Almost all sports medicine doctors would agree that there's no harm in trying Platelet Rich Plasma Injections (PRP Injections) for their patients. After all, there are hundreds of thousands of cases of positive results. All it needs is research to prove it's worth. Currently there are many independent researches going on from private funding like the one conducted by Dr. Kimberly G. Harmon M.D., director of the Primary Care Sports Medicine fellowship at University of Washington. She just recently received a gift to support her research from UW alumni who I'm guessing firmly believes in Platelet-Rich Plasma (PRP).