Does PRP Work? Platelet-Rich Plasma and Related Therapies (PRP, PRF, PRGF)

PRP, PRF, and PRGF helped me avoid a second spinal fusion and recover function across hips, knees, and feet. What the therapies actually do, why operator skill is the variable that matters, and what the FDA does and doesn't regulate.

Roughly 50 million Americans live with chronic pain and are often told surgery is the only path. Platelet-rich plasma (PRP) is one of the better-validated alternatives for the right indications: tendon and ligament injury, early osteoarthritis, and post-surgical recovery.

Living with hypermobile Ehlers-Danlos syndrome (hEDS) made one thing clear: treating symptoms without addressing the underlying damage doesn’t hold. PRP, PRGF, and other orthobiologic treatments — under the care of Dr. Rowan Paul, using ultrasound-guided injections — let me avoid a second proposed spinal fusion and rebuild function across hips, knees, shoulders, and feet.

What PRP actually is

A simple blood draw. The platelets are concentrated and injected into the injured area, where they release growth factors and cytokines that drive repair and collagen production. The mechanism matters most for tissues with limited blood supply — tendons and ligaments specifically.

Common indications:

  • Tendon and ligament injuries
  • Osteoarthritis pain
  • Post-surgical recovery

Operator skill is the variable

The product is the easy part. The outcome lives in the operator.

What to ask about:

  • Imaging. Ultrasound or fluoroscopy guidance, not blind injections.
  • Preparation. Which kit, what platelet concentration, leukocyte-rich or leukocyte-poor, and why for this indication.
  • Regulatory posture. FDA-cleared preparation device, clean handling, no off-label cellular products being passed off as PRP.

PRP, PRF, PRGF — what’s different

PRP isn’t one thing. Platelet concentration, preparation method, and injury type all change the outcome.

  • PRP — the standard preparation, used widely for tendon/ligament work and early OA.
  • PRF (Platelet-Rich Fibrin) — slower spin, retains more growth factors, thicker gel-like consistency that suits some repairs better than liquid PRP.
  • PRGF (Plasma Rich in Growth Factors) — a more advanced preparation focused on isolating specific growth factors, used in complex orthopedic repairs by providers like Dr. Ramon Cugat at Instituto Cugat.

Some providers also combine PRP with cell-based therapies (exosomes, MSCs) or energy-based modalities like shockwave or red-light laser to augment the regenerative environment. For more on cell-based options, see exosome vs. stem cell therapy.

What the literature supports

  • Tendon and ligament repair. Significant improvements in pain and function in multiple controlled trials.
  • Knee osteoarthritis. Reduces inflammation and can delay joint replacement. More on that in regenerative medicine for orthopedics.
  • Healing acceleration. Growth-factor signaling supports faster recovery and more durable structural outcomes.

What I’d tell you before booking

  • Pick the practitioner, not the clinic.
  • Understand what’s regulated and what isn’t.
  • Expect PRP to work alongside complementary care — orthobiologics, hyaluronic acid, rehab — rather than as a single-shot fix.

Regulatory status

The FDA regulates the devices used to prepare PRP, PRF, and closely related products. Many have FDA 510(k) clearance. The FDA does not regulate the practice of medicine, so application falls to licensed clinicians. The FDA has not approved PRP for any specific medical condition.

For the broader regenerative-medicine framework, the FDA has published four final guidance documents on human cells, tissues, and cellular and tissue-based products (HCT/Ps). As of 2025, the FDA has not approved exosome products for therapeutic use, and many stem cell preparations remain investigational. Patients should work with licensed providers and verify compliance with FDA or EMA standards.

This article is for informational purposes only and is not medical advice.