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BMAC & MFAT: Cellular Orthobiologics

Stem Cell Therapy for Arthritis: Hope or Hype?

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Dr. Paul Tortland, DO, Dual-Board Certified in Sports Medicine & Regenerative Medicine
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Stem Cell Therapy for Arthritis: Hope or Hype?
Written and Medically Reviewed by Dr. Paul Tortland, DO, FAOASM, CAQSM, RMSK, Dual-Board Certified in Sports Medicine & Regenerative Medicine
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October 18, 2026
What You Need to Know

Legitimate stem cell therapy for arthritis, meaning your own bone marrow or fat-derived cells (BMAC or MFAT), has real but modest evidence: short-to-mid-term pain relief and function improvement in knee osteoarthritis, with some studies suggesting it may delay total knee replacement. It is not proven to reliably regrow cartilage. The bigger hype problem is separate: umbilical cord, amniotic, and exosome 'stem cell' products sold at many clinics are not FDA-approved and independent lab testing has repeatedly found they contain no living stem cells at all.

Where to See Dr. Tortland in Connecticut

Dr. Paul Tortland, DO provides comprehensive orthopedic evaluations for patients at his Glastonbury, CT office. The practice sees patients from Glastonbury, Hartford, West Hartford, Farmington, Simsbury, South Windsor, and other Connecticut and New England communities.

📍 59 Sycamore Street, Suite 301, Glastonbury, CT 06033 — Get directions
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Legitimate stem cell therapy for arthritis, meaning your own bone marrow or fat-derived cells (BMAC or MFAT), has real but modest evidence behind it: short-to-mid-term pain relief and function improvement, with some studies suggesting it may delay total knee replacement. It is not proven to reliably regrow cartilage, and it isn't the biggest hype problem in this space. The bigger problem is separate: many clinics sell umbilical cord, amniotic, and exosome products marketed as 'stem cells' that are not FDA-approved and, according to independent laboratory testing, often contain no living cells at all. Here's how to tell the real version from the marketed one.

What Legitimate Stem Cell Therapy Actually Is

In a legitimate, FDA-compliant practice, stem cell therapy for arthritis means bone marrow aspirate concentrate (BMAC) or microfragmented adipose tissue (MFAT), cells harvested from your own body, minimally processed, and re-injected in the same procedure. Because the cells are autologous (your own) and minimally manipulated, this falls under an FDA regulatory exception (21 CFR Part 1271) rather than requiring separate drug approval, as long as the same-surgical-procedure and homologous-use requirements are followed.

This is a meaningfully different product than what's sold at many regenerative medicine clinics: donor-derived umbilical cord blood, amniotic fluid, placental tissue, or 'exosome' products that are not your own cells at all.

The Hope: What the Evidence Actually Shows

A 2025 narrative review in Medicina found that BMAC, rich in mesenchymal stem cells and growth factors, provides short- to mid-term symptomatic relief and functional improvement for knee osteoarthritis, with some studies indicating a potential to delay total knee replacement. A separate 2025 expert opinion in the Journal of Orthopaedic Surgery and Research described BMAC as a valuable source of mesenchymal stem cells with potential benefit in attenuating the inflammatory pathway of knee OA.

A prospective comparative trial of 102 patients found both BMAC and adipose-derived stem cells produced clinical and functional improvement in knee osteoarthritis, with broadly similar outcomes between the two cell sources. A 4-year follow-up study of BMAC in more severe (Kellgren-Lawrence grade III and IV) knee osteoarthritis found better outcomes than hyaluronic acid, in a population many providers would otherwise steer straight toward joint replacement.

The Honest Caveat

Even the most favorable reviews are careful with their language. A 2025 review in Frontiers/PMC literature put it plainly: BMAC has gained acceptance as a safe orthobiologic for osteoarthritis, despite lacking robust supporting evidence, and confirming its unequivocal efficacy remains limited. Variability in preparation methods, cell counts, injection protocols, and how outcomes are measured makes it difficult to say precisely how much benefit to expect, or how long it lasts, for any individual patient. This is real medicine with real but still-developing evidence, not a guaranteed cure.

The Hype: What's Actually Being Sold at Many Clinics

This is where most of the exaggerated marketing in 'stem cell therapy' actually lives, and it has little to do with BMAC or MFAT. A large and growing number of clinics market umbilical cord blood, Wharton's jelly, amniotic fluid, placental tissue, and 'exosome' injections as stem cell treatments. These are donor-derived products, not your own cells, and the FDA has been explicit: manufacturing or marketing these products as containing living, therapeutic stem cells for conditions like arthritis is, in the FDA's own words, illegal without drug approval that essentially none of these products have.

Independent laboratory testing, including work referenced in multiple peer-reviewed and regulatory sources, has repeatedly found that many commercially sold umbilical cord and amniotic 'stem cell' products contain little to no living, viable stem cells, despite the marketing. In 2025, the FDA issued a warning letter to one manufacturer, Stemell, for distributing unapproved umbilical cord blood products with documented manufacturing and safety deficiencies. That same year, the FTC obtained permanent bans and over $5.1 million in penalties against the founders of a stem cell clinic network for deceptive marketing. The Ninth Circuit separately affirmed FDA authority to regulate these products as drugs in 2024.

None of this means every regenerative treatment is fraudulent, BMAC and MFAT, your own cells, are real and regulated differently. But 'stem cell therapy' has become a marketing umbrella broad enough to cover both a legitimate, evidence-informed procedure and a product that may contain no living cells whatsoever. The label alone doesn't tell you which one you're being offered.

Who May Be a Good Candidate for BMAC or MFAT

Patients with mild-to-moderate knee or hip osteoarthritis who haven't gotten sufficient relief from PRP, physical therapy, or activity modification are the strongest candidates for cellular orthobiologic treatment. It's also sometimes used in more advanced arthritis for patients hoping to delay or avoid joint replacement, understanding that the evidence there is less robust.

Limitations: What Stem Cell Therapy Does Not Do

Dr. Tortland's Perspective

"I only use a patient's own bone marrow or fat-derived cells, harvested and processed in the same visit, never a donor product bought from a supplier and marketed as 'stem cells,'" says Dr. Tortland. "Patients ask me constantly whether stem cells will regrow their cartilage. The honest answer is that the evidence doesn't support that claim, what the evidence does support is meaningful pain relief and function improvement for the right patient, at the right stage of arthritis. If a clinic is promising cartilage regrowth from a vial of donor cells, that's a red flag. Every patient is a unique situation with a unique diagnosis, and requires that unique treatment."

For patients with more advanced arthritis, cellular orthobiologic treatment (BMAC or MFAT) is often followed by a PRP procedure 4 to 6 weeks later as part of a staged approach, and then a routine / annual PRP treatment to help maintain the relief and mobility.

Next Step

If you're considering stem cell therapy for arthritis, from anyone, ask directly whether the cells are your own or a donor product, and ask to see how candidacy is actually determined, Dr. Paul Tortland, DO is accepting new patients in Glastonbury, CT area. Contact our office to schedule a comprehensive evaluation, including same-visit diagnostic ultrasound, for an honest answer about your specific conditions, and see if stem cell treatment, or any other non-surgical regenerative orthopedic treatment, may be an option for you. ‍

About the Author

Dr. Paul Tortland, DO is a dual-board-certified, Fellowship trained physician specializing in non-surgical orthobiologics / regenerative orthopedics in the Hartford County, CT area. He is the first physician in the world to be board-certified in Regenerative Medicine, and the first physician in New England to perform PRP and BMAC /MFAT stem cell orthobiologic treatments since 2007. Dr. Tortland is especially committed to patient education, patient advocacy, and evidence-based orthopedic treatment.

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Comparison at a Glance

TreatmentMechanismDuration of Benefit / EvidenceBest Candidate Stage
BMAC (Bone Marrow Aspirate Concentrate)Autologous bone-marrow cells and growth factors, minimally processedShort-to-mid-term symptom relief; one study reported outcomes through 4 years in severe knee osteoarthritisKnee osteoarthritis, including selected more severe cases (Kellgren–Lawrence grades III–IV)
MFAT (Microfragmented Adipose Tissue)Minimally processed tissue from the patient’s own fat, containing stromal cells and other tissue componentsA comparative trial reported clinical and functional improvement broadly similar to BMACKnee osteoarthritis; candidacy depends on the individual diagnosis and severity
Hyaluronic Acid (comparator)Viscosupplement intended to improve joint lubricationUnderperformed BMAC in one 4-year follow-up study of severe knee osteoarthritisIncluded as a research comparator, not as a recommendation for every patient
Donor-Derived Products Marketed as “Stem Cells”Umbilical-cord, amniotic, placental, or exosome products; not cells harvested from the patientBenefit for arthritis is not established for many marketed products; FDA approval and product claims require careful scrutiny, and independent testing has raised concerns about viable cell contentNot presented as a recommended treatment; included to help patients distinguish these products from autologous BMAC or MFAT

Frequently Asked Questions

Is stem cell therapy the same thing as PRP?

No. PRP concentrates platelets from your blood; it doesn't contain stem cells. BMAC and MFAT are the actual stem cell therapies, cells harvested from your own bone marrow or fat tissue. The two are often used together or in sequence, but they are biologically different treatments.

Will stem cell therapy regrow my cartilage?

No. Current evidence does not support reliable cartilage regeneration in human joints from BMAC or MFAT alone. The documented benefit is pain relief and functional improvement, which is different from tissue regrowth, and any provider promising cartilage regrowth is overstating the evidence.

How do I know if a 'stem cell' product is legitimate?

Ask directly whether the cells are your own (autologous), harvested and processed in the same visit, or a donor-derived product from a supplier. Only the former is generally FDA-compliant without separate drug approval; be cautious of umbilical cord, amniotic, or exosome products marketed as stem cells.

Is stem cell treatment covered by insurance?

BMAC and MFAT for osteoarthritis are generally not covered by insurance and are billed directly to the patient, similar to PRP and most orthobiologic treatments.

What are the risks associated with stem cell therapy?

While the risks with stem cell treatment are minimal, as the stem cells come from you, the patient, there are always risks of infection / complications with any injection. As it is non-surgical, the risks are much less severe than surgery.

Am I too old for stem cell therapy?

No. We have treated patients in their teens to people in their 90's. Age is not a factor - it is rather the patient's condition / injury, and level of arthritis.

How long does a stem cell treatment last? Will I need more than one treatment?

Anywhere from several months to several years. Most patients only need one stem cell treatment, although follow-up "maintenance" PRP treatments are usually encouraged to help keep the inflammation from arthritis at bay.

How can I choose the right stem cell doctor?

1. Look for a physician highly trained in MSK Ultrasound image guidance. The injection is only as good as the doctor's ultrasound guidance expertise and skill.

2. Look for a physician with many years of experience and expertise in: Physical medicine and Rehab, Sports Medicine, and Regenerative Medicine.

  1. Look for a physician who will recommend surgery when appropriate, not someone who will push heavy sales and marketing tactics.
  2. Avoid physicians / facilities who claim "miracle" treatments and cures.
  3. Avoid physicians / facilities who claim that "off-the-shelf" products are viable, live, FDA-approved stem cells. They are either ignorant of the current research and FDA clearance laws, or worse, knowingly promoting fake stem cell products.

Glastonbury, CT · Serving Connecticut & New England

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Schedule a consultation at 59 Sycamore Street, Suite 301, Glastonbury, CT 06033. No referral required.

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Portrait of Dr. Paul Tortland, DO

Dual-Board-Certified · Fellowship-Trained · Specialist in Regenerative Orthopedics

About Paul D. Tortland, DO

Dr. Paul Tortland was the first physician in southern New England to offer PRP and BMAC + MFAT stem cell treatments for Orthopedic injuries, treating patients since 2007 with a customized, ultrasound-guided approach and measured, high-concentration PRP preparations at his Glastonbury, CT practice.

References & Further Reading

View 3 medical references and further reading
  • Wei P, Bao R. "Intra-Articular Mesenchymal Stem Cell Injection for Knee Osteoarthritis: Mechanisms and Clinical Evidence." Int J Mol Sci. 2022;24(1). DOI: 10.3390/ijms24010059
  • Lee WS, Kim HJ, Kim KI, et al. "Intra-Articular Injection of Autologous Adipose Tissue-Derived Mesenchymal Stem Cells for the Treatment of Knee Osteoarthritis: A Phase IIb, Randomized, Placebo-Controlled Clinical Trial." Stem Cells Transl Med. 2019;8(6):504-511. DOI: 10.1002/sctm.18-0122
  • Mautner K, Gottschalk M, Boden SD, et al. "Cell-based versus corticosteroid injections for knee pain in osteoarthritis: a randomized phase 3 trial." Nat Med. 2023;29(12):3120-3126. DOI: 10.1038/s41591-023-02632-w

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