Do you offer exosomes? How are they different from stem cells?

Exosomes are tiny particles that stem cells release to communicate with other cells. They carry proteins, lipids and genetic messages, such as microRNAs, but they are not cells: they do not divide or live in the tissue the way stem cells do. At Stem Cell Mexico, exosomes can be applied by IV infusion, by nebulization, by microneedling on the face, neck or scalp, or by direct injection, and they can be used on their own or combined with stem cells. The doctor recommends them when they add value to your plan, and in many cases stem cells, with PRP for joints, are enough on their own.

Exosomes have become one of the most talked-about topics in regenerative and aesthetic medicine. Many patients ask whether they are better than stem cells, cheaper, or something to add "just in case." This guide explains what exosomes are, how they differ from stem cells, how we use them and how the doctor decides whether they belong in your plan.

What are exosomes?

Every cell in the body communicates with its neighbors. One of the ways cells do this is by releasing extracellular vesicles: small, membrane-wrapped particles that carry molecular messages from one cell to another. Exosomes are a type of small extracellular vesicle, much smaller than a cell.

When mesenchymal stem cells (MSCs) are active, they release large numbers of these vesicles. The exosomes carry part of the signals that MSCs use to help regulate inflammation and support tissue repair, which is why researchers often describe them as part of the "paracrine" effect of stem cells.

The International Society for Extracellular Vesicles publishes guidelines on how these particles should be studied and characterized. Its most recent version, MISEV2023, published in the Journal of Extracellular Vesicles, describes extracellular vesicles as particles released from cells, delimited by a membrane and unable to replicate on their own. That last point is the key difference with stem cells.

How exosomes differ from stem cells

Put simply, stem cells are the "messengers," and exosomes are some of the "messages." Living stem cells can respond to the environment around them and keep releasing signals for a period of time. Exosomes deliver the messages they carry, but they do not adapt or produce new ones.

How we use exosomes

In the treatment plans we send to patients, exosomes appear in several ways:

• IV infusion: exosomes can be infused intravenously, on their own or together with an IV stem cell treatment. Typical amounts in our plans are 10 billion or more exosomes, according to the doctor's recommendation.
• Nebulization: for some conditions, such as hearing loss, exosomes are applied through a nebulizer.
• Microneedling on the face, neck or scalp: in aesthetic and hair treatments, exosomes can be applied with microneedling to support skin quality or the scalp.
• Direct injection: in some aesthetic plans, exosomes are applied by direct injection in the face, neck or scalp.
• Combined with stem cells: some plans combine an amount of stem cells with an amount of exosomes, for example an IV infusion of stem cells plus exosomes.

For hair restoration, our sister clinic TJ Hair System (opens in a new tab) offers specialized protocols.

Why exosome doses are counted in billions

Stem cell doses are counted in millions of cells, while exosome doses are counted in billions of particles. This is not because exosomes are "stronger," but because they are extremely small: a single cell releases many vesicles, and each vesicle carries only a fraction of the signals a living cell can produce. Counting particles is the standard way laboratories describe the amount of extracellular vesicles in a preparation, which is why your plan may list, for example, 10 billion exosomes next to a number of stem cells.

When does the doctor recommend exosomes?

The doctor designs your plan around your needs. In the answers we give to our patients, we explain it this way: the goal is not to add as many products as possible, but to use the treatment that is appropriate for your condition. In practice:

• For joints and the spine, the doctor usually relies on stem cells applied by direct injection with PRP. If the amount of cells and PRP already recommended is appropriate for your case, adding exosomes is often not necessary.
• For major immune and systemic conditions, the doctor may recommend exosomes, on their own or combined with stem cells.
• For hearing loss, exosomes by nebulization are part of the plans we send.
• For skin and scalp, exosomes can be applied with microneedling or injection.

If exosomes are not included in your plan, it does not mean they are not good. It means the doctor considers your plan complete without them. If you would like to add them, your advisor can send you the additional cost, and the specialist can explain how they would work together with your stem cell treatment.

What the research says

Research on exosomes is growing quickly.

• Hair: a 2025 systematic review of clinical evidence on exosomes and hair regeneration, published in Clinical, Cosmetic and Investigational Dermatology, reported improvements in hair density and other hair parameters in the clinical studies included, with good tolerability.
• Mechanism: the MISEV2023 guidelines explain how extracellular vesicles carry proteins, lipids and nucleic acids between cells, which is the basis of their biological activity.
• Source: a review in the World Journal of Stem Cells on umbilical cord MSCs describes their immunomodulatory capacity, which is mediated in part by the factors they secrete.

Results vary between patients and depend on the condition, the route, the dose and the individual.

Regulatory context

Regulations about exosome products differ between countries. In the United States, the Food and Drug Administration (FDA) has not approved any exosome product for regenerative or aesthetic uses, and it publishes consumer information about regenerative medicine products, including exosomes. In Mexico, our treatments are conducted in accordance with the applicable regulations of COFEPRIS, the federal health authority.

Exosomes or stem cells: which is better?

Neither is "better" in general. They are different tools:

• Stem cells are living cells that can respond to their environment and keep releasing signals. They are the basis of our joint, spine, systemic and neurological treatments.
• Exosomes are cell-free and deliver concentrated signals. They are useful in specific applications, such as nebulization, skin and scalp, and as a complement in some systemic plans.

The doctor chooses the tool, or the combination, that fits your condition.

Practical points

• Preparation: like stem cells, exosomes are prepared for your scheduled treatment date.
• Procedure: IV and nebulized applications are calm and comfortable. Microneedling and injections on the face or scalp are done with local comfort measures.
• Recovery: after microneedling, mild redness on the treated skin is common for a short time.
• Cost: adding exosomes changes the price of your plan, and your advisor will send you a written quote with the exact amount.

Common questions

Are exosomes alive? No. They are particles released by cells. They do not divide.

Can exosomes replace stem cells? In some applications, such as nebulization or skin and scalp treatments, exosomes are used on their own. For joints, the spine and many systemic goals, the doctor usually relies on stem cells.

Do exosomes need to match my blood type? No. Like the stem cells they come from, exosomes do not require a blood type match.

Can I add exosomes to my plan? Yes. Ask your advisor, and the specialist will explain whether they add value in your case.

Questions to ask your doctor

• Would exosomes add value to my plan, and why?
• Which route would you use: IV, nebulization, microneedling or injection?
• How many exosomes would I receive?
• How would they work together with my stem cell treatment?

Bottom line

We offer exosomes derived from umbilical cord mesenchymal stem cells, applied by IV infusion, nebulization, microneedling or direct injection, alone or combined with stem cells. Exosomes are cell-free particles that carry part of the signals stem cells use, while stem cells are living cells that can respond to their environment. The doctor recommends exosomes when they add value to your plan. A medical evaluation can help determine whether this type of regenerative treatment is appropriate for your condition, goals and medical history.