If your knee has been bothering you for years and you're not ready for a replacement, you've probably seen ads for stem cell knee injections in Mexico, Colombia or Panama. The prices look lower than in the US, and the stories sound hopeful.
This guide gives you the honest picture: what a knee treatment usually involves, what the research actually shows, what clinics abroad publish as their prices, and the story of one patient, our founder, who had his own knee treated. It is not a recommendation to travel or to have treatment. That decision belongs to you and your own doctor.
As of November 2026, none of the clinics mentioned has paid Stem Cell Directory for placement, ranking, or leads.
Disclosure: Stem Cell Directory founder John Hullinger paid for his own stem cell treatment at a clinic in Tijuana, Mexico, and does paid independent contractor work for that clinic.
What a knee treatment usually involves
Most clinics abroad that treat knees inject cells straight into the joint, usually guided by ultrasound. The details vary a lot from clinic to clinic:
- Where the cells come from. Some clinics use donor cells from umbilical cord tissue. Others use your own cells, taken from fat or bone marrow on the same day.
- How many cells. Clinics describe doses in millions of cells. For example, one Medellín clinic's published knee price covers 50 million umbilical cord cells.
- Add-ons. Many clinics also offer platelet-rich plasma (PRP), made from your own blood, and exosomes, which are tiny particles released by cells. Some add an IV infusion as well.
- How long it takes. A single knee injection can be done in one day. Some clinics sell three- or four-day packages with tests and follow-up visits.
What is still unknown is just as important. Researchers don't yet agree on the best cell type, the right dose, or which patients are most likely to benefit, and the products sold by different clinics are not standardized.
What the evidence says
Here is what the strongest sources we checked actually found, in plain words.
No stem cell product is FDA-approved for knee arthritis. The US Food and Drug Administration says regenerative medicine therapies have not been approved for any orthopedic condition, including osteoarthritis and knee pain. The FDA also says it has received reports of serious harms from unapproved products, including blindness, tumor formation and infections.
A large US trial found no clear winner over a steroid shot. In a 2023 randomized trial published in Nature Medicine, 480 people with knee osteoarthritis got one of three cell injections (their own bone marrow, their own fat tissue, or donor umbilical cord cells) or a standard corticosteroid injection. All groups reported less pain after a year, but none of the cell injections did better than the steroid shot, and MRI scans showed no meaningful change in the joint in any group. No serious procedure-related side effects were reported. A later analysis of the same trial found that some patients, particularly men, were more likely to respond to certain cell injections, which suggests some people may benefit more than others.
A lot of the improvement may come from the placebo effect. A 2025 review that pooled eight trials comparing cell injections with a dummy injection estimated that roughly half to two-thirds of the improvement people felt could be explained by the placebo effect, with the cells themselves adding a modest extra benefit. The authors rated the evidence as low certainty.
Some reviews are more positive. A 2026 review of 11 trials found that cell injections reduced pain and improved function compared with other treatments, and called for larger trials to confirm it. So the research is mixed, and the studies are still fairly small.
Arthritis doctors currently advise against it. The 2019 American College of Rheumatology and Arthritis Foundation guideline for knee and hip osteoarthritis strongly recommends against stem cell injections, mainly because the products and techniques vary so much. The same guideline strongly recommends exercise, weight loss where needed, and steroid injections in the knee.
Put simply: stem cell knee treatment is investigational. Some people report real relief, results vary, it is not proven to rebuild cartilage, and it is not covered by Medicare.
What knee treatment costs abroad
These are the clinics' own published prices, collected for our cost guides and rechecked on October 23, 2026. Prices change, so treat them as a starting point and always ask for an itemized written quote.
| Country | Published knee prices (US dollars) | Example and what's included |
|---|---|---|
| Mexico | About $3,900 to $6,000 for a knee or single joint; one Guadalajara clinic lists $4,000 to $9,000 for knees | Some packages include tests, more than one infusion and transport; others cover only the treatment. Details on our Mexico cost guide. |
| Colombia | From $1,999 (Medellín, 50 million cells, one day); from $5,000 for a 4-day knee osteoarthritis package (Cali) | The $1,999 price covers the cells, operating room, local anesthesia, an ultrasound-guided injection, one consultation and a bilingual coordinator. The hotel, airport transfers, sedation and exosomes cost extra. See our Colombia cost guide. |
| Panama | Clinics mostly sell whole programs from about $5,000 to $30,000, not single knee injections | Programs usually last about five days and often include a hotel and airport transfers. See our Panama cost guide. |
For comparison, a study of US direct-to-consumer clinics found an average of $5,156 for one same-day knee stem cell injection, with prices from $1,150 to $12,000.
Remember the costs that don't show up in a clinic's price: flights, hotel nights and meals, a travel companion, imaging or blood tests before you go, add-ons such as PRP or exosomes, and any repeat visits. If you're weighing countries, our comparison of Mexico, Colombia and Panama puts the rules and travel side by side.
One patient's story: John's knee, about a year later
Our founder, John Hullinger, has played competitive tennis for most of his life and was on court 12 to 14 hours a week before his treatment. His right knee had been giving him trouble for years. At 48 he fully ruptured the patellar tendon in that knee playing basketball, and in the fall of 2025 he aggravated it badly at a national tennis tournament.
At 60, he had three problem joints and wasn't ready to start replacing them. In November 2025 he paid for treatment at a clinic in Tijuana: stem cell injections with PRP and exosomes into his right knee, right shoulder and left big toe, plus a separate IV infusion of stem cells.
He tells the full story in the video below. About his knee, he says stairs used to be a problem (he has 34 of them at home), and that 11 months later he can climb them without any issue, get out of a chair easily, and is back on the tennis court and doing leg workouts in the gym.
He was also very patient. He stayed off the tennis court for 60 days, restarted at about 20% intensity for only five minutes at a time, used slow walks and a stationary bike with no resistance, and waited about eight months before pushing his knee at full effort.
John is the first to say this is not proof. In his words: "One person's experience is not scientific proof that a treatment works." He also did physical therapy and exercise during that time, so he can't say how much of his improvement came from the cells, and he points out that someone else could spend thousands of dollars and see no improvement at all.
The video loads from YouTube (privacy-enhanced mode, youtube-nocookie.com) only when you press play. Watch it on YouTube · More from Regenerate After 60
This is John’s personal experience, not medical advice. Individual results vary. Talk to a licensed physician before making any decision about your own health.
Want to see what his whole trip cost? He breaks down every dollar in What I Actually Paid, All In.
How to find knee-focused clinics in the directory
Stem Cell Directory lists clinics by country, and each profile records the conditions the clinic says it treats, so you can see which ones mention knees, joints or arthritis. Start with our country guides for Mexico, Colombia and Panama, or learn how to use the directory to find a clinic.
Before you book, ask every clinic the same questions in writing:
- Which cell type and source will you use for my knee, and how many cells (in millions)?
- How many injections or sessions are included, and is the injection guided by ultrasound?
- What is the total price, and what is not included?
- What results have you seen in patients with knees like mine, and how do you measure them?
- What are the risks, and what happens if I have a problem after I get home?
- Will you send my records and imaging to my doctor at home?
A clinic that promises a cure, says your cartilage will regrow, or pressures you to pay quickly is a clinic to skip.