Platelet-rich plasma (PRP) therapy is an innovative, though well-established, approach to healing common injuries. It was first used in the 1970s by doctors specializing in blood disorders to treat patients with low platelet counts. Today, with over 50 years of evidence behind it, doctors are using PRP to help a growing number of patients heal from their various conditions, including acute and chronic soft tissue injuries, such as rotator cuff tears of the shoulder and mild meniscal tears. PRP has been increasingly used to treat osteoarthritic conditions, as well as ligamentous sprain and strains.