New York has no shortage of clinics promising to regenerate what time has worn down. Exosomes for the skin, the hair, the joints and the brain. Stem cells for the knee, the back, the shoulder and the face. The marketing language is lavish: cellular renewal, natural healing, the body repairing itself. The prices are often high, the consent forms often thin and the explanation of what is actually being injected frequently vague.
The category is also genuinely interesting. Regenerative medicine is a serious scientific field, and some of its therapies are legitimate, approved and well studied. The difficulty is that legitimate and unapproved offerings are sold side by side, in similar rooms, with similar words, and a patient cannot tell them apart without asking the right questions.
This guide is built around ten of them. It begins with what exosomes and stem cells are, explains the regulatory landscape in plain terms, and then walks through the questions that separate a careful clinic from a risky one. It reflects the evidence first perspective of Dr. Bissoon, a physician at Liondale Medical in Manhattan whose practice describes regenerative medicine in terms of mechanism, evidence and fit, and is meant as general education and not as a description of any particular product.
A great deal of confusion disappears once the vocabulary is clear.
Stem cells are cells that can divide and become other kinds of cells. In the body they are found in bone marrow, fat, blood, umbilical tissue and elsewhere. In clinics, the phrase can refer to cells taken from the patient’s own body, which are processed and reinjected, or to cells derived from donated tissue such as umbilical cord, placenta or amniotic fluid. These are very different things with very different regulatory and safety implications.
Exosomes are tiny packets released by cells, containing proteins, fats and genetic fragments, and they carry messages between cells. They are not cells themselves, which means they cannot divide or grow. Commercial exosome products are typically derived from cultured cells, often from donated tissue, and are isolated and concentrated. The word is often used loosely, and some products labeled as exosomes contain little that has been shown to be exosomes at all.
Platelet rich plasma, or PRP, is made from the patient’s own blood, concentrated to contain more platelets, and injected. It is a different, simpler and better studied treatment than either stem cells or exosomes. For hair, PRP makes most sense after hair labs rule out a treatable cause, and a wider regenerative primer places it among other options.
Regenerative medicine is the umbrella term for treatments intended to repair, replace or restore tissue. It includes established therapies such as bone marrow transplantation for blood cancers and tissue engineered skin, as well as experimental and unproven ones.
Knowing these definitions helps you read a menu. A clinic that lists “stem cells”, “exosomes” and “growth factors” as if they were interchangeable is either imprecise or not being straightforward.
In the United States, products that act on the body in these ways are regulated, and understanding the regulation tells you a lot.
The Food and Drug Administration has approved certain stem cell based products, mainly blood forming stem cells from cord blood for specific blood and immune disorders. It has not approved stem cell products for orthopedic, cosmetic, neurological or anti ageing uses of the kind most commonly advertised by wellness clinics. The agency has also stated that it has not approved any exosome product for any use, and it has issued warnings to consumers and to companies marketing unapproved products.
That does not necessarily make every use illegal. Some cell based treatments that use a patient’s own tissue, processed minimally and used in the same procedure for a similar function, can fall outside the strictest approval requirements. But the boundary is narrow, and many clinics operate on the wrong side of it, or close to it. For a patient, the practical meaning is that “available in New York” does not mean “approved” or “proven”, and that the responsibility for explaining the status of any product rests on the clinic.
A reputable practice will tell you plainly what the regulatory status of a product is. If a clinic cannot or will not, that is information.
This is the most important question, and it should have a precise answer. Is it the patient’s own cells, processed on site? Is it a product derived from donor tissue? Is it an exosome preparation? What is the source tissue, and who made it?
A clinic should be able to name the manufacturer or the process and explain what the product contains. “Proprietary blend” is not an answer. Vague or shifting descriptions are a reason to pause.
The answer should be direct. If the product is not approved for the use being proposed, the clinic should say so, explain the basis on which it is offering it and describe what that means for you. Phrases such as “FDA registered facility” are sometimes used to imply more than they mean, because registering a facility is not the same as approving a product.
Ask the clinic to point to the evidence for the specific problem you want treated. For exosomes, human evidence for most applications is early and limited. For stem cell injections in conditions such as knee osteoarthritis, there are studies, with mixed results and wide variation in the products and methods used. For PRP, there is a larger body of evidence for some uses, including certain tendon and joint problems and hair, though results vary.
An honest answer, as in discussions of peptide therapy, sounds like this: what is known, what is suggested and what is hype.
Ask who will examine you, who will perform the procedure and who will follow up. A physician with relevant training and a real examination is not the same as a technician working from a protocol. The distinction is that of a physician led clinic, and it matters at least as much for injectable biologic products as for infusions.
A good regenerative practice begins with a diagnosis. If you have knee pain, what is the cause? If you have hair thinning, why? If you have fatigue, what do the tests show? Be wary of any clinic that offers the same treatment to everyone regardless of problem, or that recommends it after a brief chat without examination or testing.
A plan built on precision diagnostics follows measurement, not the other way around.
For donor derived products, ask about donor screening, testing for infectious disease and sterility testing of the final product. These are not abstract concerns. There have been documented cases in which contaminated or improperly prepared products led to serious infections, including in people who sought treatment for minor complaints. A clinic that cannot describe its safety testing is not a clinic to trust with an injection.
For a patient’s own cells, ask how they are collected, processed and handled, in what environment and with what sterility controls.
The risks include infection, pain, swelling, allergic or immune reactions, and the possibility of no benefit. Some routes carry specific dangers, such as injections near the eye, where severe complications have been reported with unapproved products. A responsible clinic will describe risks concretely and explain the plan for managing complications, including whom to call at night.
Before treatment, agree on what success looks like and how it will be measured. For a joint, that might be pain scores and function. For hair, it might be photographs and counts. For energy, it might be a symptom scale plus relevant labs. Without a baseline and a defined time frame, “it worked” and “it did not work” are equally unfalsifiable, and a clinic can keep selling indefinitely.
Ask for a written quote that lists the product, the procedure, follow up and any repeat treatments. Understand how many sessions are expected and what happens if the first does not help. Be cautious about pressure to buy large packages or to decide on the spot, and be especially cautious of prices that seem very high for a product whose source and evidence are unclear.
Many regenerative treatments are paid for out of pocket, and insurance rarely covers them. Ask directly about coverage and about the terms of any refund or credit if you stop.
A trustworthy physician has alternatives in mind. For a painful joint, there may be physical therapy, injections with established evidence or surgery. For hair loss, there are proven medications. For general energy and longevity, there is a long list of well understood foundations. If a clinic cannot name an alternative, it may be selling a product and not practicing medicine.
Exosome products are marketed for skin rejuvenation, hair growth, joint pain, wound healing, anti ageing and even cognition. The scientific basis is that exosomes carry signals that can influence inflammation, cell growth and repair in laboratory and animal studies.
That is a long way from showing that an injected or topical commercial preparation produces those effects in people. Questions include whether the product actually contains what it claims, how consistent it is from batch to batch, whether it reaches the target tissue and whether the effect is real and lasting. Much of the published human evidence consists of small studies, and many products have never been tested in humans at all.
Patients should therefore treat exosome offerings as experimental. That does not mean no one benefits, but it means expectations should be modest and decisions informed.
Stem cell injections, particularly for orthopedic problems, are the most widely marketed regenerative treatment. The pitch is that cells will rebuild cartilage, tendon or other tissue. In practice, the cells injected may act less by becoming new tissue and more by releasing signals that modulate inflammation, if they act at all.
Research in knee osteoarthritis has shown promising signals in some studies and little benefit in others, with enormous variation in cell source, preparation and patient selection. It is difficult to compare clinics, because the products and methods differ so much. Cartilage regrowth has not been convincingly demonstrated as a routine outcome.
Patients with advanced joint damage may find that stem cell injections do not avoid the need for surgery, and that valuable time and money were spent. Patients with mild to moderate symptoms may feel better, and the question is whether that is the treatment, the placebo effect or the natural course of the condition.
The sounder view of regenerative medicine, whether in a primer or in the case of frailty, is that regeneration depends on the conditions in which tissue repairs itself. Hormonal balance, metabolic health, muscle mass, sleep, inflammation and nutrition set the stage, and a high tech injection placed in a poorly prepared setting is unlikely to deliver much.
That framework affects what a physician might recommend first. Measuring hormones, glucose control, inflammation and nutrient status; strengthening muscle, which matters especially in sarcopenic obesity; and treating sleep and stress, may offer more benefit, at lower risk and cost, than any biologic injection.
For patients who still wish to explore regenerative options, the best way to learn what regenerative medicine services are and are not offered is to ask directly.
Much of the exosome marketing in New York is aimed at the skin and scalp, often combined with microneedling so that the product is pushed into the skin. The appeal is obvious, since the procedure is minor and the promise is rejuvenation.
Two points are worth keeping in mind. First, microneedling itself triggers a healing response and can improve skin texture, so improvement after a combined treatment cannot be attributed to the exosomes without a comparison that includes microneedling alone. Second, products applied to or pushed into the skin are not necessarily sterile or standardized, and cosmetic grade products are regulated differently from drugs.
For hair, the more established starting point is a proper diagnosis. Thinning has many causes, including hormonal changes, thyroid disease, iron deficiency, medications and genetics, and the right treatment depends on which is responsible. Proper hair loss diagnosis, with labs before treatment, reflects the principle that the cause comes first. Adding an unproven injectable to an unexamined problem is a good way to spend money without learning anything.
Orthopedic complaints drive much of the stem cell market. A person with a painful knee, shoulder or hip is told that cells can repair the damage and avoid surgery.
Before considering that route, it helps to ask what else has been tried and what the imaging shows. Strengthening and physical therapy have solid evidence for many joint problems, weight management reduces load on weight bearing joints, and established injections have their own evidence base. Imaging reveals how advanced the damage is, which shapes what any treatment could realistically achieve.
A frank orthopedic opinion is valuable here. A surgeon or sports medicine physician who sees the joint can say whether the problem is likely to respond to conservative care, an injection or surgery. If a regenerative treatment is then considered, it is a deliberate choice among options, not a first step based on an advertisement.
Placebo effects are powerful in conditions where pain and symptoms fluctuate, and they are especially strong when a treatment is invasive, expensive and delivered with confidence and ceremony. A procedure that feels significant, delivered by someone who inspires trust, can produce real improvement in how a person feels, independent of the product injected.
This does not mean the improvement is fake. It means that feeling better after a regenerative injection does not prove the injection did anything. It also means that the stronger the marketing and the higher the price, the more a patient should ask how the clinic separates the product’s effect from the effect of the experience.
Well designed studies use a comparison group that receives a sham procedure for exactly this reason. When you read that a treatment “works”, ask whether such a comparison was part of the evidence.
After any injected biologic, the clinic’s behavior in the following weeks says a great deal about its standards.
A responsible practice will give you written aftercare instructions and a number to call. It will schedule a follow up to check for complications and to assess response against the baseline you agreed. It will document what was injected, including lot numbers where applicable, and give you a copy. It will tell you when to expect results and when to be concerned. And it will be willing to discuss a lack of response honestly, rather than suggesting an immediate repeat.
A less responsible practice may disappear after payment, encourage you to purchase more sessions whether or not you improved, or attribute a lack of response to your failure to follow instructions.
The cost of regenerative treatment is easy to underestimate, because the headline price is rarely the whole bill. Add the consultation, any imaging or labs, repeat treatments, time off work and travel. Then add the cost of what you could have done instead, such as therapy, evaluation or established treatments.
A useful exercise is to ask what you would spend the same money on if the treatment were not available, and whether that alternative has stronger evidence. Sometimes the answer will be that the regenerative option is worth a try, and sometimes it will show that the budget is better directed elsewhere.
Comparing standard labs with precision diagnostics illustrates how better measurement can reveal treatable problems that no injection would fix, which is often the most valuable use of a first appointment.
Patients in Queens, Brooklyn, the Bronx and Westchester search for nearby treatment, and a local listing is natural. Convenience matters, but it should not be the deciding factor for an injected biologic. The questions above are the same wherever the clinic is, and a nearby clinic with vague answers is a worse choice than a farther one with clear ones.
If travel is a consideration, ask whether the initial evaluation can be done efficiently, whether follow up can be arranged to reduce trips and whether the practice provides ongoing support afterward. A treatment you cannot follow up on is less safe.
Some signs are serious enough to walk away from.
Claims to cure serious or incurable diseases. Reluctance to name the product or its source. No physician involvement or examination. Pressure to pay a deposit immediately or to buy a package. Guarantees of results. No written consent describing risks. Testimonials offered in place of evidence. A treatment room that does not look like a medical setting. And an insistence that regulators or mainstream medicine are suppressing the treatment.
A single red flag deserves attention. Several together are a strong reason to look elsewhere.
Some readers will have had exosome or stem cell treatment already. If you have a concerning reaction, such as increasing pain, swelling, redness, heat, fever, drainage or any vision change after treatment, contact a physician promptly. Keep the details of what was injected, where it was made and who performed it, because that information helps other doctors if complications arise.
If you simply did not get the result you hoped for, that does not necessarily mean something went wrong. Share the details with a physician who can reassess the underlying problem.
A reasonable first step is a conversation with a physician who will examine you, review your history and tell you honestly whether regenerative treatment makes sense. You can book a consultation at Liondale Medical and bring the ten questions above, any quotes from other clinics, a list of medications and supplements and relevant imaging or lab results.
For patients who want to understand how a physician led practice approaches ongoing care and decision making more broadly, the question of whether concierge medicine is worth it comes down to what that model offers.
Exosomes and stem cells are real scientific subjects, and regenerative medicine is a serious field, but most of what is sold in wellness clinics is unapproved and supported by limited evidence. Exosomes are tiny signaling packets and not cells, stem cells vary hugely by source, and neither is FDA approved for the uses commonly advertised. The best protection is a set of questions: what is in the syringe, what is its status, what is the evidence for my condition, who is responsible, how was it tested, what are the risks, how will we measure success, what does it cost and what else could I do. A clinic that answers them clearly is worth considering, and one that does not is not.
Stem cells are living cells that can divide and become other cell types. Exosomes are tiny signaling packets released by cells and cannot divide or grow. They are different products with different regulatory and safety considerations.
Get a proper diagnosis and address foundations such as hormones, metabolic health, muscle strength, sleep and inflammation. These steps often offer more benefit at lower risk and cost, and they help any later treatment work better.
This page was written and medically reviewed by Lionel Bissoon, D.O., founder of Liondale Medical. Dr. Bissoon is a board-certified osteopathic physician specializing in anti-aging and concierge medicine on the Upper West Side of Manhattan.
This content is for educational purposes only and does not constitute medical advice. Individual results may vary. Consult a qualified physician before beginning any new treatment.
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