What it is
Knee osteoarthritis is a condition in which the joint's cartilage and surrounding tissues change and wear over time, often causing pain, stiffness and reduced movement. Many people look for options when everyday activities become uncomfortable.
Clinics that advertise stem cell therapy for the knee typically offer injections made from bone marrow aspirate, fat (adipose-derived) tissue, umbilical cord or Wharton's jelly material, or exosome products. Some are drawn from the patient's own body, while others come from donated tissue.
FDA status matters here. Blood-forming stem cell transplants from cord blood or bone marrow, used for certain cancers and blood disorders, are the clearly FDA-approved use. Stem cell products marketed for knee osteoarthritis are generally not FDA-approved for that purpose, and the FDA has publicly warned people about unapproved stem cell clinics and products. Reported risk categories include infection, immune reaction, and tumor formation at the injection site. Unapproved products injected into the eye or spine have also caused permanent injury, which shows why sourcing and oversight matter.
How it’s traditionally been approached
Knee osteoarthritis has traditionally been approached with a range of conservative, clinician-guided options. These may include activity changes, physical therapy, weight management, supportive devices, and over-the-counter or prescription medications, depending on the person.
Some people are also offered injections or procedures that are established and regulated, and in some situations surgery is discussed. Which of these is appropriate is a decision for a licensed clinician after an evaluation.
Stem cell injections for the knee are a newer, more debated area. Some clinics promote them, while many medical professionals urge caution because the products are generally unapproved for this use. Anyone interested in exploring them is best served by a registered clinical trial, which can be found by searching ClinicalTrials.gov, rather than a clinic selling an unproven product.
How the right provider may help
The right provider, such as an orthopedic or sports medicine clinician, may help you understand what is happening in your knee through an evaluation, a conversation about your history and goals, and possibly imaging. A good visit is generally unhurried and invites your questions.
You can ask: What exactly is in this product, and where does it come from? What is its FDA status for knee osteoarthritis? What are the specific risks, and what is the realistic chance of benefit? What are the alternatives, including doing nothing? What is the total cost, and can I walk away at any time?
A provider may also discuss registered clinical trials as a route to legitimate experimental care. Be cautious about treatment abroad: medical tourism carries materially higher risk because safety, sourcing and regulatory standards differ, and complications are harder to address from a distance. A vetted domestic provider is a safer first step.
The whole-person view
Chronic joint pain does not live only in the knee. Pain, sleep, mood and stress influence one another, and worry about mobility can make discomfort feel heavier. Looking at the whole person can be a helpful part of any plan.
Body-based support such as Somatic Experiences may help some people build awareness of tension and stress held in the body, and talk therapy through Therapists.plus may help with the emotional side of living with ongoing pain. These approaches are complementary options, not replacements for medical care, and every approach has a place for different people.
Somatic Experiences: nervous system regulation →Somatic Experiences: embodiment and movement →Therapists.plus: mind body connection →
Keep in mind
- Red flags include guarantees of results, words like "cure" or "regrow," refusal to name the product or its FDA status, pressure to decide quickly, and discouraging a second opinion.
- Informed consent should cover the exact product and FDA status, specific risks, realistic chance of benefit, alternatives including doing nothing, total cost disclosure, and your right to walk away. This page is not a consent form.
- If you suspect a problem after a procedure, you can report it through the FDA's MedWatch safety reporting program and contact your state medical board. Seek care from a licensed professional first.
- Licensed professionals should guide care for serious conditions. For emergencies call 911; in a crisis call or text 988.
Not sure where to start? Answer a few gentle questions and choose who you’d like to hear from.
Frequently asked questions
What are the risks of stem cell therapy for knee osteoarthritis?
Reported risk categories include infection, immune reaction, and tumor formation at the injection site. Products from unapproved sources may also vary in quality and content. A licensed clinician can explain how these apply to your situation.
Is stem cell therapy for knee osteoarthritis FDA-approved?
No, stem cell, bone marrow aspirate, adipose-derived, umbilical cord and exosome products marketed for knee osteoarthritis are generally not FDA-approved for that use. The clearly approved use is blood-forming stem cell transplants for certain cancers and blood disorders. The FDA has warned the public about unapproved clinics and products.
Can stem cells regrow cartilage in the knee?
No treatment can be claimed to regrow cartilage, and anyone promising this is a red flag. Marketing claims are not the same as proven, approved outcomes. Ask any provider what evidence supports their claims and what the FDA status is.
How can I tell if a stem cell clinic is a red flag?
Be wary of guarantees of results, "cure" or "regrow" language, refusal to name the product or its FDA status, pressure to decide quickly, and discouragement of a second opinion. Getting a second opinion from an independent licensed clinician is always reasonable.
Is it safe to get stem cell treatment for the knee abroad?
Treatment abroad is materially higher risk because safety, sourcing and regulatory standards differ, and complications are harder to address from a distance. A vetted domestic provider is a safer first step. Ask a licensed clinician before making travel plans.
How do I report a problem or find a legitimate clinical trial?
You can report a suspected problem through the FDA's MedWatch safety reporting program and your state medical board. To explore legitimate experimental care, search ClinicalTrials.gov for registered trials and discuss them with a licensed provider.
Educational resource. Safe Stem Cells shares general information and connects people with independent providers. It is not medical advice, diagnosis or treatment. Talk with a licensed professional about your health.