Stem Cell Therapy for Arthritis & Osteoarthritis: What the Research Says

Conditions  ·  By the Regenerative Treatment Guide Editorial Team  ·  Medical review by our Medical Advisory Board (forming)  ·  Updated June 10, 2026  ·  8 min read

Arthritis is one of the most common reasons people explore regenerative medicine — and also one of the most misunderstood. Online ads often promise that stem cells will "regrow your cartilage" and reverse arthritis. The reality, based on the research, is more nuanced and more honest: regenerative injections are an actively studied, investigational option that may help some people manage pain and inflammation, but they are not a guaranteed cure and they do not reliably rebuild a worn-out joint. This guide explains what arthritis is, how stem cell therapy is thought to work, what the evidence actually shows by joint, who may be a candidate, and the questions worth asking.

Understanding arthritis & osteoarthritis

"Arthritis" simply means joint inflammation, and there are many types. The most common — and the one most relevant to regenerative injections — is osteoarthritis (OA), the "wear-and-tear" form. In OA, the smooth cartilage that cushions the ends of the bones gradually breaks down. As that cushion thins, the joint becomes inflamed and you feel stiffness, swelling, and pain that often worsens with activity or after rest. OA can affect the knee, hip, shoulder, hands, spine, and other joints, and it's a leading cause of disability in adults.

It's worth distinguishing OA from inflammatory or autoimmune arthritis such as rheumatoid arthritis, which is driven by the immune system attacking the joints and is managed primarily with medications by a rheumatologist. Most regenerative injection research focuses on osteoarthritis, not autoimmune disease.

How is stem cell therapy thought to work for arthritis?

This is the most important — and most misrepresented — part. Much of the scientific interest in mesenchymal stem cells (MSCs) for arthritis centers on their anti-inflammatory and immunomodulatory signaling, not on wholesale tissue regrowth. In other words, MSCs appear to influence the joint environment — calming inflammation and releasing growth-signaling factors — rather than reliably rebuilding lost cartilage.

This helps explain a pattern researchers and clinicians often observe: some patients report relief even when imaging shows limited structural change. It also explains why "guaranteed cartilage regrowth" claims should be viewed skeptically — the evidence does not support promising that arthritis will be reversed. MSCs for the joint generally come from one of three sources: bone marrow (BMAC), adipose (fat) tissue, or umbilical cord tissue (Wharton's jelly) processed in an FDA-registered lab. Learn more in our complete guide to stem cell research.

What does the research show, by joint?

The depth of evidence differs a lot by joint. Thousands of studies are indexed on PubMed, with hundreds of trials on ClinicalTrials.gov, but quality and quantity vary:

• Knee OA — the most studied. A 2020 meta-analysis of nine randomized controlled trials reported improvements in some pain and function scores, while cautioning that the trials were small and varied. See our knee pain guide.
• Hip OA — fewer high-quality studies; explored for mild-to-moderate disease. See our hip pain guide.
• Shoulder OA — emerging, smaller body of research. See our shoulder pain guide.
• Other joints (hands, ankle, spine facets) — earlier-stage and more limited evidence.

For a fuller, sourced review by condition, see our MSC research for orthopedic pain pillar.

Who may be a candidate?

While only a licensed provider can confirm candidacy after reviewing your history and imaging, people who tend to explore stem cell therapy for arthritis include:

• Adults with mild-to-moderate osteoarthritis in one or more joints
• Those whose pain hasn't responded to physical therapy, medication, or prior injections
• People who want to explore non-surgical options before considering joint replacement
• Patients who aren't candidates for surgery, or who want to delay it

Certain conditions may make someone not a candidate — for example active cancer, active infection, or certain blood disorders. Advanced "bone-on-bone" arthritis may respond less well to injections than earlier-stage disease, and inflammatory/autoimmune arthritis should be managed with a rheumatologist.

Stem cell therapy vs. other arthritis treatments

vs. cortisone (corticosteroid) injections

Cortisone can reduce inflammation and provide short-term relief, but the effect often fades within weeks to months, and repeated use may have downsides for the joint over time. Regenerative approaches aim to support the joint environment rather than simply suppress inflammation — though they typically cost more and aren't covered by insurance.

vs. PRP (platelet-rich plasma)

PRP uses concentrated platelets from your own blood and is widely used for osteoarthritis, alongside or instead of stem cell therapy. It is generally less expensive. The best choice depends on your condition and the provider's assessment.

vs. joint replacement surgery

Compared with joint replacement, regenerative injections are minimally invasive with little downtime. Replacement is major surgery with a longer recovery — but for severe, end-stage arthritis it is a well-established and often highly effective option. The right choice depends entirely on your individual situation.

What does it cost?

Stem cell therapy for arthritis in the U.S. commonly ranges from roughly $3,000 to $10,000 per session, depending on the joint treated, cell source, provider, and whether more than one area is involved. Because many of these uses are still considered investigational, insurance usually does not cover them. Many clinics offer financing or payment plans. For a full breakdown, see our guide on how much stem cell therapy costs.

Questions to ask a provider

• Is this treatment FDA-approved or investigational for my type and stage of arthritis?
• What does the evidence suggest for someone with my joint and disease stage?
• What cell source do you use, and how is it processed?
• How many sessions might I need, and what's the total cost?
• What results are realistic — and will you avoid promising cartilage regrowth or a cure?

Not sure where regulation stands? See our guide to whether stem cell therapy is FDA approved and safe.

Frequently asked questions

Related reading

• Stem Cell Therapy for Knee Pain: What the Research Says
• Stem Cell Therapy for Hip Pain
• Stem Cell Therapy for Shoulder Pain
• How Much Does Stem Cell Therapy Cost?
• MSC Research for Orthopedic Pain