Platelet Rich Plasma (PRP) is obtained by concentrating the patient’s blood sample to obtain a platelet-rich fraction. It has been shown that soft tissue healing happens most efficiently when platelet concentration is greater than 1,000,000/μl, as compared with a normal platelet count of 200,000/μl (average). Several studies have demonstrated the usefulness of PRP solutions in the healing of tendon injuries and Achilles tendinitis.   
Unlike reconstructive surgery that may permanently weaken the tendon and associated structures, PRP therapy aims to rebuild and strengthen tissues. Moreover, patients with partial tendon tears may take anti-inflammatory agents and pain medication to control the swelling and pain, but the side effects of these drugs may be too unpleasant to continue medication use. In this regard, Platelet Rich Plasma therapy offers easy intervention measures for effective and lasting repair as well as as the control of painful symptoms.
A small volume of solution (containing the PRP) is injected around the painful ligament, tendon insertions or adjacent joint spaces. The cells secrete factors, such as platelet-derived growth factor (PDGF), transforming growth factor beta (TGF-b), vascular endothelial growth factor (VEGF) and epithelial growth factor (EGF), which promotes natural repair and regeneration.
R3 Stem Cell has achieved Institutional Review Board (IRB) approval for the following study, please read about it here on ClinicalTrials.gov:
SAFETY AND CLINICAL OUTCOMES WITH AMNIOTIC AND UMBILICAL CORD TISSUE THERAPY FOR NUMEROUS MEDICAL CONDITIONS
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 Vora A, Borg-Stein J, Nguyen RT. Regenerative injection therapy for osteoarthritis: fundamental concepts and evidence-based review. PM R. 2012 May;4(5 Suppl):S104-9.
 de Mos M, van der Windt AE, Jahr H, et al. Can platelet-rich plasma enhance tendon repair? A cell culture study. Am J Sports Med. 2008 Jun;36(6):1171-8. Epub 2008 Mar 7.
 Monto RR.Platelet rich plasma treatment for chronic Achilles tendinosis. Foot Ankle Int. 2012 May;33(5):379-85.