For someone living with persistent joint or tendon pain, the most meaningful treatment benefits are often practical: less discomfort and better everyday function. Platelet-rich plasma, or PRP, has shown these benefits in some clinical studies, making it a treatment worth discussing for selected musculoskeletal conditions.
PRP also offers a practical advantage over procedures that collect bone marrow or fat: it starts with a blood draw. Understanding where PRP has shown promise, and how it differs from treatments marketed as stem cells, can help you weigh the options with your orthopedic clinician.
How PRP works
PRP is prepared by processing a sample of your blood to concentrate platelets in plasma, the liquid portion of blood. Platelets release proteins involved in tissue repair and cell signaling. The goal of treatment is to use these biological signals at the site of a joint or tendon problem.
That biological rationale helps explain the interest in PRP. Clinical studies are still needed to establish whether a specific preparation improves symptoms for a specific diagnosis. PRP is not a stem cell treatment, and symptom improvement does not necessarily mean damaged cartilage or a torn tendon has regenerated.
Potential benefits for knee arthritis
One of the main areas of PRP research is mild to moderate knee osteoarthritis. For people whose arthritis limits daily activities, the potential benefits include reduced symptoms and improved knee function without an operation.
In a randomized trial involving 53 patients and 87 knees, three weekly injections of a PRP preparation containing relatively few white blood cells produced better symptom and function scores than saline at several follow-up points, including 12 months. This provides evidence that PRP can offer meaningful improvement in some patients; it does not establish a guaranteed duration of relief.
Results are mixed. The larger RESTORE trial found no significant advantage over saline for pain or cartilage volume at 12 months. Differences in preparations and patient groups complicate comparisons and do not fully explain the conflicting results.
For patients considering PRP, meaningful goals might include walking more comfortably, managing stairs with less pain, or returning to a preferred activity. Discuss which goals are realistic for your knee and how progress will be measured. Tracking pain and function over time can help you and your clinician assess whether treatment is providing a worthwhile benefit.
How PRP compares with stem cell procedures
The phrase “stem cell treatment” can describe very different preparations. Some involve bone marrow or fat collected from the patient; others use laboratory-prepared cells from a patient or donor. They should not be treated as interchangeable.
Bone marrow aspirate concentrate, also called BMAC or BMC, is one commonly discussed option. Marrow is collected through a needle, often from the pelvis, then processed. The resulting concentrate contains a mixture of cells and other components, rather than a purified dose of stem cells.
| Comparison | PRP | Cell-based preparations |
|---|---|---|
| Starting material | Your blood | Bone marrow, fat, or other specified tissue/cell sources |
| Contents | Concentrated platelets in plasma | Varies by product; may contain mixed cells or laboratory-prepared cells |
| Collection | Blood draw | May require marrow or fat collection; donor products follow a different process |
PRP avoids the additional marrow or fat collection procedure. This is a concrete procedural advantage when comparing these options, although it does not make a PRP injection risk-free or establish that it is right for every patient.
More involved treatment does not guarantee greater benefit
A randomized study of 90 people with knee osteoarthritis found similar patient-reported improvements with PRP and bone marrow concentrate through two years. BMAC was not superior to PRP. Because the study had no placebo group and some participants did not complete later follow-up, it cannot establish how much improvement came from the injections themselves.
For patients weighing the two procedures, this finding is relevant: a more involved collection process did not produce better results in that trial. It supports asking what additional benefit a proposed cell procedure has demonstrated for your diagnosis before accepting the extra procedure and expense.
The FDA warns that stem cell products marketed for orthopedic conditions have not been approved for those uses. Ask about the exact product and intended use; “FDA registered” does not mean FDA approved. Neither PRP nor cell injections should be presented as a reliably proven way to regrow cartilage or prevent future joint replacement.
For a broader look at PRP uses beyond joint and tendon care, read PRP: More Than Just a Vampire Facial from Elite Performance & Age Management, Dr. Martin’s separate age-management practice (external link).
PRP and persistent tendon pain
Chronic tennis elbow is another condition in which PRP has shown clinical promise. This problem affects the tendon attachment on the outside of the elbow and can make gripping or lifting painful.
A randomized trial comparing PRP with corticosteroid injection reported better longer-term pain and function outcomes with PRP at two years. This suggests a potential benefit beyond short-term symptom relief for some patients with persistent tennis elbow.
The comparison matters, however: another trial found no benefit over saline at one year. Results for one tendon also should not be applied to every tendon problem. A large Achilles tendinopathy trial found no functional advantage for a single PRP injection over a sham procedure at six months. Diagnosis, rehabilitation, and realistic expectations remain essential.
Put potential benefits into a complete treatment plan
If you are considering PRP, start with an evaluation of the condition causing your pain. The discussion should connect the available evidence to your symptoms, previous treatment, medical history, and goals.
Useful questions include:
- What benefit has PRP shown for my specific condition?
- How does it compare with rehabilitation, medication, or other appropriate options?
- Which preparation and injection schedule would be used, and why?
- What will recovery involve, when will we reassess, and what is the full cost?
PRP uses your own blood, but injections can still cause pain, swelling, bleeding, or infection. Marrow or fat collection adds risks at the collection site. Review medications and medical conditions with the treating clinician; do not stop prescribed medication on your own. Insurance coverage varies, so confirm costs before treatment.
The purpose of considering PRP is to identify a reasonable opportunity for symptom relief and improved function within an individualized plan. Rehabilitation and other established treatments remain important. If advanced arthritis continues to limit daily life, joint reconstruction and replacement may also deserve discussion; trying PRP is not a requirement before seeking that evaluation.
Discuss your options with Dr. Martin
If joint or tendon pain is limiting your activities in Las Vegas, request an orthopedic appointment with Dr. Martin. An evaluation can clarify your diagnosis and help you discuss whether PRP or another treatment fits your needs and goals.
