What it is
Bone marrow aspirate concentrate, often called BMAC, is a preparation made from a person's own bone marrow. A clinician draws marrow, usually from the hip bone, and a device spins it to concentrate certain components. These may include a mix of cells and signaling proteins.
BMAC is sometimes described as a type of stem cell therapy, but that label can be misleading. The concentrate is a mixture, and only a small portion of its cells may be stem or progenitor cells. What it actually contains can vary from person to person and from one system to another.
In the U.S., the only FDA-approved stem-cell products are cord-blood-derived hematopoietic progenitor cell (HPC) products for certain blood and immune disorders, used in specialist transplant settings. BMAC for joint, tendon, or other orthopedic uses is not FDA-approved, and the FDA has warned the public about unapproved stem cell products.
How it’s traditionally been approached
Bone marrow aspiration itself is a long-established medical procedure, used for diagnosis and in specialized transplant care. Using the concentrated marrow in orthopedic settings is a separate matter, and it is generally considered investigational.
Some clinicians and researchers have explored BMAC in areas such as joint, cartilage, and tendon conditions. The evidence is limited and still developing, and it should not be taken as proof that BMAC works for any particular person or condition.
Regulators generally treat how a product is made and used as important. Some clinics rely on exceptions in FDA rules, and those exceptions are narrow and often debated. Because of this, it is reasonable to ask any provider directly how they believe their offering fits within FDA requirements.
How the right provider may help
The right provider, such as a licensed orthopedic or sports medicine clinician, may help you understand your options, including conventional ones, and whether any regenerative approach is even being considered. A visit generally starts with a history, an exam, and possibly imaging, followed by a conversation about risks, alternatives, and what is and is not known.
Helpful questions include: Is this product FDA-approved or is it being offered as unapproved? Is it part of a study registered on ClinicalTrials.gov with IRB oversight? What are the risks and alternatives, including doing nothing or considering surgery? What would the written informed consent say?
You can also confirm the clinician's license with your state medical board. A trustworthy provider should be comfortable with these questions, should describe evidence as limited where it is, and should never promise a result.
The whole-person view
Body, mind, and stress affect each other. Ongoing pain or limited movement can raise stress and worry, and stress can in turn make the body feel more tense and sensitive. Looking at sleep, movement, daily routines, and emotional wellbeing alongside a physical concern is part of a whole-person view.
Some people explore body-based support such as Somatic Experiences to build awareness of how stress is held in the body, and others find talk therapy through Therapists.plus helpful for coping with pain, uncertainty, or big health decisions. These are supportive options to discuss with your care team, not substitutes for medical evaluation.
Somatic Experiences: embodiment and movement →Therapists.plus: mind body connection →
Keep in mind
- BMAC is not FDA-approved for orthopedic uses, and no exosome product is FDA-approved either; the FDA has warned the public about unapproved stem cell and exosome products.
- Watch for red flags: claims that a treatment cures or treats everything, paying to join a "clinical trial," testimonials offered in place of evidence, and pressure to travel abroad or across states for treatment. Calling something "holistic" or "alternative" does not change its FDA status.
- Only a licensed clinician can decide what is appropriate for you after an evaluation, and licensed professionals should guide care for any serious condition.
- 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
Is BMAC FDA approved?
No, BMAC is not FDA-approved for orthopedic or joint uses. The only FDA-approved stem-cell products in the U.S. are cord-blood-derived hematopoietic progenitor cell (HPC) products for certain blood and immune disorders. Ask any provider how they describe the regulatory status of what they offer.
Is BMAC the same as stem cell therapy?
Not exactly. BMAC is a concentrate of bone marrow that contains a mix of cell types and proteins, and only some of its cells may be stem or progenitor cells. It is often marketed as stem cell therapy, but that does not make it an FDA-approved product.
Does BMAC regrow cartilage or help me avoid surgery?
There is no reliable basis to promise that. Evidence for BMAC is limited and investigational, and no one can guarantee tissue regrowth or that surgery will be avoided. A licensed clinician can discuss your options and alternatives after an evaluation.
Why do some clinics offer BMAC if it is not FDA-approved?
Some clinics rely on narrow exceptions in FDA rules or offer it as part of research. Those claims can be debated, so it is wise to ask how the clinic believes its use complies with FDA requirements and to request the details in writing.
How can I check whether a BMAC study is legitimate?
Look for the study on ClinicalTrials.gov and ask whether an institutional review board (IRB) oversees it. Be cautious if you are asked to pay to join a "trial." Also confirm the clinician's license with your state medical board.
What should I ask before considering BMAC?
Ask about the product's FDA status, the evidence for your specific situation, the risks, and the alternatives. Request written informed consent that covers all of these. Only a licensed clinician can decide what is appropriate for you after an evaluation.
Educational resource. StemCell.biz 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.