Knee arthritis is one of the most common causes of knee pain and reduced mobility in adults. If you’re experiencing stiffness, swelling, or discomfort that limits your ability to stay active, you may be exploring treatment options beyond medications, cortisone injections, or surgery.
One treatment that has received growing attention is Platelet-Rich Plasma (PRP) therapy. While research continues to evolve, many patients are interested in whether PRP may help manage symptoms associated with knee osteoarthritis.
What is Knee Osteoarthritis?
Knee osteoarthritis (OA) is a degenerative joint condition that occurs when the cartilage within the knee gradually wears down over time. Common symptoms include:
- Knee pain
- Joint stiffness
- Swelling
- Reduced range of motion
- Difficulty with walking, exercising, or daily activities
Risk factors may include age, previous injuries, excess body weight, repetitive joint stress, and genetics.
What Is PRP Therapy?
Platelet-Rich Plasma (PRP) is prepared from a patient’s own blood. A blood sample is collected and processed to concentrate platelets, which contain naturally occurring growth factors and other bioactive proteins.
The PRP is then injected into the affected area using sterile technique. In many cases, ultrasound guidance is used to help ensure accurate placement.
How Is PRP Thought to Work?
Researchers believe PRP may influence biological processes involved in inflammation and tissue signaling. Platelets contain growth factors that play a role in the body’s natural healing response.
While the exact mechanisms are still being studied, PRP has been investigated for its potential to:
- Support the body’s natural healing processes
- Influence inflammatory pathways
- Promote a healthier joint environment
It is important to note that PRP is not FDA-approved for the treatment of knee osteoarthritis, and individual results can vary.
What Does the Research Show?
A growing number of clinical studies have evaluated PRP for knee osteoarthritis.
1) 2025 Meta-Analysis: PRP Injections for the Treatment of Knee Osteoarthritis
Key Findings
The authors found that:
- Patients receiving PRP generally reported greater improvements in pain and function compared with control treatments.
- Benefits were observed across multiple follow-up time points.
- PRP demonstrated statistically significant improvements in several commonly used osteoarthritis outcome measures.
- The findings supported PRP as a treatment option for symptomatic knee osteoarthritis.
Citation: https://pubmed.ncbi.nlm.nih.gov/39751394/
2) 2021 Meta-Analysis: PRP Injections for the Treatment of Knee Osteoarthritis
Key Findings
The researchers found that:
- Patients who received PRP experienced greater improvements in pain and function than those who received hyaluronic acid injections.
- These improvements were observed at several follow-up intervals, including longer-term follow-up.
- PRP was associated with better scores on commonly used osteoarthritis assessment tools.
- Both treatments were generally well tolerated, with no major differences in adverse events reported between groups.
Citation: https://pubmed.ncbi.nlm.nih.gov/32551947/
PRP Has Been Associated with Improvements in Pain and Function
Several randomized controlled trials and systematic reviews have reported that patients receiving PRP experienced improvements in pain and physical function compared to their baseline symptoms.
Some studies have found these improvements may last several months, although results vary between individuals and study designs.
Comparisons with Other Injection Therapies
Researchers have also compared PRP with other commonly used injection therapies, including hyaluronic acid and corticosteroid injections.
Certain studies have reported greater improvements in patient-reported pain and function scores following PRP treatment. However, outcomes are not consistent across all studies, and additional research is needed to better understand which patients may benefit most.
Research Is Growing
Although many published studies show promising results, researchers continue to investigate:
- Optimal PRP preparation methods
- Appropriate treatment protocols
- Long-term outcomes
- Which patient populations are most likely to benefit
As with many regenerative medicine therapies, scientific understanding continues to evolve.
Who May Be a Candidate for PRP?
PRP may be considered for individuals who:
- Have symptomatic knee osteoarthritis
- Are seeking non-surgical treatment options
- Have not achieved satisfactory symptom relief from conservative treatments
- Wish to discuss regenerative medicine approaches with their healthcare provider
A comprehensive evaluation is important to determine whether PRP may be appropriate based on your medical history, imaging findings, symptoms, and treatment goals.
What to Expect After Treatment
Experiences vary from person to person. Some patients report temporary soreness at the injection site following treatment.
Because PRP uses a patient’s own blood, it is generally considered minimally invasive. However, as with any injection procedure, potential risks and side effects should be discussed with your healthcare provider.
The Bottom Line
Current research suggests that PRP may have the potential to improve pain and function in some individuals with knee osteoarthritis. However, outcomes vary, and no treatment can guarantee specific results.
If you are considering PRP, it is important to speak with a qualified healthcare provider who can review the available evidence, discuss potential risks and benefits, and help determine whether PRP is appropriate for your situation.
Interested in Learning More About PRP for Knee Pain?
At RegenRx, we provide comprehensive evaluations for individuals experiencing knee pain and osteoarthritis. During your consultation, we can review your symptoms, imaging, and treatment history to discuss available options and help you make an informed decision about your care.
Contact our team today to discuss your options, schedule a consultation, or get answers to any concerns you may have. We look forward to guiding you on your journey to better wellness.