PRP Therapy for Knee OA: A Cross-Comparison of Treatments

How does PRP compare to corticosteroids and hyaluronic acid for knee osteoarthritis? A systematic review and meta-analysis offers valuable insight.

For knee osteoarthritis, the practical question is rarely whether a treatment exists — it is which option actually fits the joint in front of you. Platelet-rich plasma (PRP) continues to draw strong research interest as a non-surgical choice, and a useful way to judge it is head-to-head against the other injections commonly offered for the knee.

PRP draws on the body’s own healing signals. A small blood sample is concentrated and injected into the affected knee under ultrasound guidance, with the goal of reducing pain and stiffness and improving how the knee functions. PRP is not a proven way to regrow cartilage or reverse arthritis, though some evidence suggests it may help slow cartilage loss over time.

A systematic review and meta-analysis offers useful insight into how PRP compares to other common knee osteoarthritis treatments, such as corticosteroids and hyaluronic acid. Six months after treatment, PRP was at least as effective as those options — and on some measures more so — for pain relief, function, and stiffness.

That tracks with what plays out in practice: appropriately selected patients often report meaningful pain relief and improved mobility after PRP. Results vary, and PRP is most useful in earlier-to-moderate arthritis. Which is why the decision starts with an exam and imaging to confirm the knee is a reasonable candidate — the point is to match the treatment to the joint, not to default to one injection for every knee.