Is Stem Cell Therapy in Mexico Safe? What FDA, Scientists and Mexican Law Say

Is stem cell therapy in Mexico safe?

For almost every condition that clinics advertise, the answer is no: the treatments are unproven, and some have caused serious harm. That is true whether the clinic is in Mexico or in the United States. Only a short list of stem cell treatments has been shown to work, and they are given in hospitals, not sold as packages. This page explains what is proven, what has gone wrong, how Mexican law treats these clinics, and what to ask if you are still considering it.

xcuro does not list or refer patients to stem cell clinics. This page is for your protection, not a sales page.

What is actually proven

The International Society for Stem Cell Research (ISSCR), the main scientific body in the field, says very few stem cell treatments have been proven safe and effective. The best established is blood stem cell transplantation, such as a bone marrow transplant, for certain blood and immune disorders and to rebuild the blood system after some cancer treatments. Some skin, bone and cornea grafts also rely on stem cells. ISSCR says all other uses are experimental and should be offered only in regulated clinical trials (ISSCR).

In the United States, FDA's list of approved cellular products includes several cord-blood stem cell products for blood-forming disorders (FDA list). In December 2024, FDA also approved Ryoncil (remestemcel-L), a donor mesenchymal stromal cell product, for one narrow use: children with acute graft-versus-host disease after a transplant that has not responded to steroids (FDA). No stem cell product is FDA-approved for knee or back pain, multiple sclerosis, ALS, Parkinson's, autism, stroke, heart or lung disease, or anti-aging.

What FDA warns about

FDA says it has received reports of blindness, tumor formation, infections and more after unapproved products sold as regenerative medicine, including stem cells, fat-derived cells (stromal vascular fraction), cord blood, amniotic fluid, Wharton's jelly and exosomes (FDA). It says these products have not been approved to treat any neurological disorder, including multiple sclerosis, ALS, Alzheimer's, Parkinson's, epilepsy or stroke; any heart or lung disease; any orthopedic condition such as arthritis, back, knee, hip or shoulder pain; or autism, macular degeneration, chronic pain or fatigue. FDA adds that a listing on ClinicalTrials.gov, or a firm's registration with FDA, does not mean a product is legally marketed, and that patients charged for these products outside a trial are "likely being deceived" (FDA). There are no FDA-approved exosome products (FDA consumer alert).

Documented harms

• Blindness. Three women lost most or all of their vision after a U.S. clinic injected fat-derived "stem cells" into both eyes for macular degeneration; a year later their vision ranged from 20/200 to no light perception (Kuriyan et al., New England Journal of Medicine, 2017).
• A tumor-like growth. A man who received stem cell injections at commercial clinics in China, Argentina and Mexico developed a growth in his spinal cord that, according to the Boston doctors who studied it, came from the injected cells; he developed back pain, paralysis of the legs and incontinence (Berkowitz et al., New England Journal of Medicine, 2016).
• Hundreds of cases. The Pew Charitable Trusts found reports of 360 people harmed by unapproved stem cell interventions between 2004 and September 2020, including 104 hospitalizations, 9 cases of partial or complete blindness, 16 tumors or growths, and organ failure that in several cases led to death. Pew says the true number is likely higher, because clinics rarely report harm (Pew, 2021).
• A global pattern. A 2018 review of published case reports and media reports found adverse events after unproven stem cell interventions in many countries, and described "stem cell tourism" as a driver (Bauer et al., Stem Cells Translational Medicine, 2018).

How Mexico regulates stem cell clinics

Mexico's General Health Law (Ley General de Salud) requires a sanitary license (licencia sanitaria) for establishments that handle stem cells, transplants and "regenerative medicine", under Article 315 (Ley General de Salud). A reform published in January 2026 added definitions of stem cell banks, stem cell collection centers and regenerative medicine establishments, and requires establishments that use stem cells for treatment to join a national vigilance system and report their use to the Ministry of Health (Ley General de Salud, reform of January 15, 2026).

A license is about the facility: staff, equipment and procedures. It is not proof that a treatment works. COFEPRIS, Mexico's health regulator, made this point when it shut down the cell therapy area of a Mexico City clinic in 2015 for offering mesenchymal cell and platelet-rich plasma treatments without authorized research protocols or human trials, and warned that stem cell treatments "lack authorization because their efficacy is not proven" (COFEPRIS). When a clinic says it is "COFEPRIS-licensed", ask what exactly the license covers, and whether the treatment you are being offered is part of an approved research protocol.

What it costs, and who pays

Unproven stem cell treatments are not covered by insurance, so patients pay cash, often raised from friends and strangers. In a study of 1,030 GoFundMe campaigns for stem cell treatments of neurological conditions started from November 2017 through 2018, campaigns asked for a total of $33.4 million and received $5.1 million. Clínica Ruiz in Puebla, Mexico, was the third most common named destination, after clinics in Panama City and San Diego (Snyder and Turner, Neurology, 2019). Our own arithmetic: that is about $32,500 requested per campaign, but it is a fundraising goal across destinations, not a price list. An earlier study of 408 campaigns found that every mention of risk described the treatment as low-risk (Snyder et al., JAMA, 2018). ISSCR warns that out-of-pocket costs can be "enormous" once travel and lodging are added (ISSCR).

Red flags

• The same treatment is offered for many unrelated conditions. ISSCR says a single cell type is very unlikely to treat diseases of different organs.
• The clinic glosses over or minimizes the risks. ISSCR says every medical procedure carries risk.
• The clinic points to ClinicalTrials.gov or an FDA registration as proof. FDA says neither means the product is approved.
• Patient testimonials instead of published results. ISSCR warns that testimonials can be misleading.
• Claims of "no risk", or cells that "know where to go".
• Pressure to book quickly, discounts for paying now, or requests to stop your current treatment.

Questions to ask before you decide

• What exactly will be injected, where does it come from, and how is it processed and tested?
• Is this part of a registered clinical trial with ethics approval? Can I see the protocol? Search it yourself on ClinicalTrials.gov.
• What published evidence, in peer-reviewed journals, supports this treatment for my condition?
• What are the risks, and what happens if I have a complication after I fly home?
• Will this make me ineligible for future trials or approved treatments? ISSCR says it can.
• What does the facility's COFEPRIS license cover?

Take the answers to your own specialist before you pay. ISSCR's patient handbook has a longer list. If you were harmed after a stem cell or exosome product, FDA asks you to report it to MedWatch (how to report).