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Walk through the websites of a dozen regenerative clinics and you will see the two words used as though they were synonyms, or as though exosomes were simply a newer and therefore better version. Neither is accurate.

What a stem cell is

A stem cell is a living cell that can divide and can differentiate into other cell types. The ones used in this field are mesenchymal cells, typically sourced from perinatal tissue donated after birth. Once administered they remain metabolically active for a period, releasing signalling molecules that influence the tissue around them.

What an exosome is

Exosomes are small vesicles that cells release as part of normal signalling. They carry proteins and genetic material and act as messages between cells. They are not alive, do not divide and do not become anything else. An exosome preparation is, in effect, the signalling component without the cell that produced it.

Why you would choose one over the other

Because they are not alive, exosome preparations are simpler to handle and store, and the dose is more consistent from batch to batch. Because they are alive, cells continue producing signal over time rather than delivering it all at once.

Which is more appropriate depends on the tissue and the objective. In practice many protocols use both. What should worry you is a clinic that always recommends the more expensive option regardless of the case.

What the evidence supports

Research in both areas is active and incomplete. There is more published work on mesenchymal cells simply because they have been studied for longer. Exosome research is growing quickly but is younger, and claims about it frequently run ahead of the data.

The practical version

Ask which one your protocol uses, why that one was chosen for your case, and what it would cost with the alternative. If the reasoning is clinical you will get a clear answer. If it is commercial you will get an adjective.

Choosing a clinic in this field is difficult precisely because every website says the same things. Everyone is advanced, certified, world-class and patient-focused. None of those words can be checked.

The questions below can be. We would rather you asked them of us too.

About the people

• Who is the physician who will treat me, and what is their licence number? In Mexico this is the cédula profesional, searchable in a public federal registry.
• Will I speak to that physician before I travel, or only to a coordinator?
• Who decides whether I am accepted, and on what criteria? If the answer is vague, the criteria are probably commercial.

About the material

• Which laboratory supplies the cells, and can I see the certification?
• What exactly am I receiving — cells, exosomes, or platelet-rich plasma from my own blood?
• What is the viability figure for the batch, and where does it come from?

About the outcome

• What proportion of patients with my condition see no meaningful improvement?
• What will you not promise me? This is the most revealing question on the list.
• Who do you turn away? If the answer is nobody, ask yourself what that means about the last patient they accepted.

About the money

• Is this the full price, and what is excluded? Get it in writing before you book travel.
• What happens if the physician decides I need more material once I arrive?
• What does follow-up consist of, and is it included?

Two answers that should end the conversation

The first is a guarantee. Regenerative therapy produces variable results, and any clinic promising a specific outcome is promising something it does not control.

The second is pressure. Limited availability, a price that expires, a deposit needed today to hold your place. Legitimate medicine does not work to a countdown.

One more thing

Ask what they would say if the treatment is not appropriate for you. A clinic willing to lose your booking is a clinic whose recommendation means something.

Ask three clinics in Tijuana what stem cell therapy costs and you may get three answers an order of magnitude apart. That is not because one of them is cheating you — though some might be — but because the phrase covers products that have very little in common.

What you are actually paying for

The single largest variable is the material itself. A protocol using a small quantity of an autologous preparation drawn from your own blood costs a fraction of one using cultured cells produced in a certified laboratory. Both may be described on a website as stem cell therapy.

The second variable is quantity. Cellular products are usually priced per ampoule or per unit, and a systemic intravenous protocol may require many times the material of a single joint injection. This is why an IV programme costs more than a knee — not because it works better.

The third is everything around the procedure: physician time, imaging review, facility, follow-up. Some clinics include these, some quote the material alone and add the rest later.

Why Mexican prices are lower than US prices

Comparable treatment in the United States, where available at all, commonly costs several times more. The gap reflects regulatory environment, facility overheads and local wage levels. It does not reflect a difference in the cells: laboratories supplying Mexican clinics operate to certification standards, and the physician administering the injection holds a federal licence you can verify.

Questions worth asking before you pay a deposit

• Is this price for the complete protocol, or per session?
• How many ampoules or units does it include, and what happens if the physician decides more are needed?
• Which laboratory supplies the material, and can I see the certification?
• Is the consultation included? Is follow-up included?
• What is not included that I should budget for?
• Does the price change if I need a second course?

A clinic that answers these plainly is telling you something about how it operates. A clinic that will not quote a price until you have spoken to a salesperson is also telling you something.

On very cheap and very expensive quotes

Prices well below the market are worth understanding rather than dismissing. Sometimes they reflect a smaller quantity of material than you assumed, sometimes a different product entirely. Ask what the number covers and compare like with like.

At the other end, a higher price does not buy a better outcome. There is no evidence that paying twice as much produces twice the benefit, and no clinic can honestly promise you a result at any price.

Our position

Our protocol prices are published in full on the pricing page. They are the same for every patient and they cover the complete protocol, the consultation and follow-up at three, six and twelve months.