The short answer
Stem cell treatment uses living cells that can develop into other cell types, or that release signalling molecules, with the aim of repairing or calming damaged tissue. A small number of stem cell therapies are FDA approved — almost all of them for blood and immune disorders. The great majority of treatments sold in clinics for joints, ageing, and chronic disease are not FDA approved, and the evidence behind them ranges from genuinely promising to very weak. This guide explains which is which.
Last updated: August 2026 · Written and edited by: Farhan Feroz Ali · Every clinical page on this site cites its sources.
Why this guide exists
If you search for stem cell treatment, almost everything you find is written by a clinic that wants to sell it to you, or by a booking agency that earns a commission when you book. Both have a reason to tell you it works.
This guide is written differently. Where the evidence is strong, we say so. Where it is weak, we say that too — including when saying so costs us business. You will find sections here that no clinic website will ever publish, such as the finding that most of the pain relief people report after stem cell knee injections appears to come from the placebo effect rather than the cells.
We think you deserve that before you spend $15,000.
What a stem cell actually is
Most cells in your body have one job for life. A liver cell stays a liver cell. Stem cells are different in two ways:
- They can renew themselves, making more stem cells.
- They can differentiate, becoming a more specialised cell type.
There are several kinds, and the differences matter a great deal when you are comparing treatments.
| Type | Where it comes from | What it is used for | Status |
|---|---|---|---|
| Haematopoietic stem cells (HSCs) | Bone marrow, blood, umbilical cord blood | Rebuilding blood and immune systems | Long-established, FDA approved for specific uses |
| Mesenchymal stromal cells (MSCs) | Bone marrow, fat, umbilical cord tissue | Most clinic treatments for joints and chronic disease | Experimental for nearly all of these uses |
| Induced pluripotent stem cells (iPSCs) | Adult cells reprogrammed in a lab | Research, early trials | Not available as a clinic treatment |
| Embryonic stem cells | Early-stage embryos | Research, a few early trials | Not available as a clinic treatment |
One clarification that trips up most patients: the cells sold in almost every “stem cell clinic” are mesenchymal stromal cells. Researchers increasingly avoid calling them stem cells at all, because in the body they mostly act as signalling cells rather than by turning into new cartilage or new nerve tissue. That distinction is the single most useful thing on this page. Read more about MSCs.
How a stem cell procedure actually works
For the treatments most commonly sold to patients, the process is short and usually done in a day.
- Consultation and imaging. Assessment of your condition, often with an MRI or ultrasound.
- Sourcing the cells. Either from your own body — bone marrow drawn from the pelvis, or fat taken by mini-liposuction — or from a donated umbilical cord product prepared by a lab.
- Processing. The sample is spun in a centrifuge and concentrated. What comes out is not pure stem cells; it is a mixed cell population containing some.
- Delivery. Injection into the joint, into the spine, or intravenously.
- Recovery. Usually same-day discharge, with weeks to months before any change is assessed.
Two honest notes. First, the number of viable cells actually delivered varies enormously between clinics and is rarely disclosed. Second, intravenous delivery for joint or neurological conditions has particularly weak evidence — most infused cells are filtered out by the lungs within hours.
What stem cell treatment is used for
Where the evidence is genuinely strong
Blood and immune disorders. Haematopoietic stem cell transplantation for leukaemia, lymphoma, sickle cell disease, and certain immune deficiencies is established medicine with decades of data. This is real, it is FDA approved, and it is done in hospitals — not in wellness clinics.
Aggressive multiple sclerosis. Autologous haematopoietic stem cell transplantation (AHSCT) has substantial evidence in carefully selected patients. In the MIST randomised trial, progression-free survival at five years was approximately 90% for AHSCT compared with about 25% for standard disease-modifying therapy. Joint recommendations from ECTRIMS and the EBMT support it for relapsing-remitting MS that has not responded to high-efficacy drug therapy. Transplant-related mortality in modern practice is around 0.3%. This is a serious hospital procedure with real risks, not a clinic infusion. Full article.
Where the evidence is weak or unsettled
Knee osteoarthritis. This is the most commonly sold stem cell treatment in the world, so the evidence deserves close attention. A 2025 systematic review and meta-analysis of eight randomised controlled trials covering 467 patients compared MSC injections against inert placebo. It found that roughly 63% of the pain reduction at six months, and about 50% at twelve months, was attributable to contextual effects — patient expectation, the ritual of treatment, and regression to the mean — rather than to the cells. The authors concluded the cells themselves confer “only a modest incremental benefit,” and rated the certainty of the evidence as low.
That does not mean patients are imagining their improvement. The improvement is real. It means much of it would likely have happened with a convincing placebo injection costing a fraction of the price. Full article.
COPD, autism, neuropathy, anti-ageing, erectile dysfunction, hair loss. These are widely advertised. Published evidence is largely limited to small, uncontrolled studies, case series, and clinic-run registries without placebo comparison. There is currently no high-quality randomised evidence establishing that stem cell treatment changes the course of any of these conditions.
A pattern worth knowing
The wider a clinic’s condition list, the more sceptical you should be. Legitimate cell therapy is narrow and specific. A clinic offering the same infusion for arthritis, autism, diabetes, COPD, and ageing is not treating five diseases — it is selling one product five ways.
Is stem cell treatment FDA approved?
Mostly no, and the way clinics phrase this is often deliberately misleading.
The FDA has approved a set of cord blood haematopoietic progenitor cell products — including ALLOCORD, CLEVECORD, DUCORD and HEMACORD, alongside licensed products from Clinimmune Labs, MD Anderson Cord Blood Bank, LifeSouth and Bloodworks. Every one of them is approved for disorders affecting the production of blood, and nothing else.
No stem cell product is FDA approved for knee arthritis, back pain, COPD, autism, ageing, or general wellness. Stromal vascular fraction (SVF) from fat is not lawfully marketable for these uses, and no exosome product has FDA approval despite being sold widely.
Three phrases that should end the conversation
If a clinic tells you the treatment is “FDA approved,” that the clinic is “FDA registered” so the treatment is approved, or that being in an FDA “registry” means the same thing — walk away. Facility registration is paperwork. It is not product approval, and the distinction is the entire point.
Read the full breakdown of FDA status.
Risks and side effects
Stem cell treatment is not risk-free, and “it’s your own cells so it’s safe” is not an accurate statement.
- Procedural risks — infection, bleeding, pain at the harvest or injection site.
- Contamination — there have been documented outbreaks of serious bacterial infection traced to unapproved stem cell products.
- Blindness — patients have been permanently blinded by fat-derived cell injections into the eye.
- Blood clots and embolism — reported with intravenous infusion.
- Tumour formation — rare but documented with some unproven cell products.
- Financial harm — the most common harm by far. Many patients spend retirement savings on treatments that do not work.
What it costs
Prices vary widely and are almost never published up front, which is itself a warning sign.
| Market | Typical range | Notes |
|---|---|---|
| United States | $5,000–$25,000+ | Consultation $800–$2,500; harvest $5,000–$12,000; injection $3,500–$9,000 per site |
| Mexico | $3,000–$20,000 | Most common medical tourism destination for US patients |
| Panama, Colombia, Costa Rica | $5,000–$25,000 | Often marketed as premium programmes |
| Thailand, India, South Korea | $2,000–$30,000 | Wide quality variation |
| Western Europe | €17,000–€50,000 | Frequently only available inside clinical trials |
Insurance in the US and Canada does not cover stem cell treatment for these uses, because it is considered experimental. Bone marrow transplantation for cancer is covered; a knee injection at a regenerative clinic is not. Full cost guide.
How to judge a clinic
If you decide to proceed, judgement is your main protection. The strongest single filter: ask the clinic to name the peer-reviewed randomised controlled trial supporting their treatment for your specific condition. A good clinic will send you a paper. A bad one will send you testimonials.
Warning signs worth taking seriously:
- Claims of FDA approval, or heavy emphasis on “FDA registered”
- Any promise, guarantee, or success-rate figure not backed by published trials
- The same treatment offered for a long and unrelated list of conditions
- Pressure to decide quickly, or discounts that expire
- Testimonials in place of data
- No named, licensed physician performing the procedure
- Refusal to disclose cell type, dose, and viability
- Payment demanded in full and up front
The full 12 red flags and 15 questions to ask before you pay.
Free alternatives worth checking first
Before paying anything, search ClinicalTrials.gov for your condition. Legitimate trials are usually free to participate in, are overseen by an institutional review board, and are where the genuinely promising work is happening. If a clinic is charging you $20,000 to be part of its “study,” that is not a clinical trial in any meaningful sense. How to find and join a trial.
Frequently asked questions
Does stem cell therapy actually work?
For blood and immune disorders, and for carefully selected aggressive MS patients, yes — with strong published evidence. For the joint, ageing, and chronic disease treatments sold in most clinics, the evidence is currently weak, and controlled trials suggest much of the reported benefit comes from placebo effects rather than the cells.
Is stem cell therapy covered by insurance?
Not for these uses in the US or Canada. Established transplant procedures for cancer and blood disorders are covered. Regenerative clinic treatments are classed as experimental and are paid out of pocket.
How long does it take to work?
Clinics typically describe changes over 6 to 12 weeks, with assessment at 3 to 6 months. Be cautious of any clinic promising rapid results.
Is it painful?
Bone marrow harvest is uncomfortable and usually done under local anaesthetic with sedation. Injections cause soreness for a few days.
Are treatments abroad safe?
It depends entirely on the clinic, not the country. Some overseas clinics operate to high standards; others operate specifically because their local regulation is looser than the FDA’s. Judge the individual clinic, its physicians, and its published evidence.
What is the difference between stem cells and exosomes?
Exosomes are tiny vesicles released by cells, not cells themselves. They are sold as a cheaper alternative. No exosome product has FDA approval, and the evidence base is thinner still. Comparison.
Explore the full guide
- Stem Cell Therapy Costs — real prices by country and condition, insurance, and financing
- Treatment by Condition — knee, back, MS, COPD, neuropathy and more, each rated by evidence
- Types of Stem Cells — MSCs, exosomes, autologous vs allogeneic, explained plainly
- Safety and Regulation — what is FDA approved, documented risks, and clinic red flags
- Where to Go — destinations compared, and how to vet any clinic anywhere
Considering treatment?
Tell us about your condition and we will send you our free clinic-vetting checklist — the same questions we would ask on our own behalf — and, if you want it, an introduction to providers who meet our transparency criteria. We are not a medical provider and we do not give medical advice.
Sources
- US Food and Drug Administration — Approved Cellular and Gene Therapy Products.
- Contextual effects of mesenchymal stem cell injections for knee osteoarthritis: systematic review and meta-analysis of randomised controlled trials. Frontiers in Medicine, 2025.
- Autologous haematopoietic stem cell transplantation for multiple sclerosis and NMOSD — recommendations from ECTRIMS and the EBMT. Nature Reviews Neurology, 2024.
- Burt RK et al. Effect of non-myeloablative HSCT vs continued DMT on disease progression in relapsing-remitting MS (MIST trial). JAMA, 2019.
- International Society for Stem Cell Research — Patient Handbook on Stem Cell Therapies.