How to choose a TB-500 provider

TB-500 is sold in two markets that look almost identical from the outside. One is prescription medical care: a licensed clinician evaluates you, writes a prescription if it is appropriate, and a licensed pharmacy prepares and dispenses it. The other is a chemical sold online under a “research use only” label, with no clinician, no pharmacy, and no dispensing oversight

The vials can look the same. The websites can look the same. What differs is everything behind the vial — and that is what this guide teaches you to check. It is written to be useful on any provider, including us.

Reviewed by —Daniel Uba, MD, Chief Medical Officer

What TB-500 actually is

TB-500 is a synthetic peptide corresponding to a fragment of thymosin beta-4, a small protein found naturally in human cells. It is a laboratory-made copy of part of something your body already produces — that is the whole of the identity claim, and it is worth being precise about it.

TB-500 is not an FDA-approved medication. Preparations available through licensed telehealth are compounded: made by a licensed pharmacy for an individual patient based on a prescription, under state and federal pharmacy rules. Compounding is a legal, regulated part of US pharmacy practice, but a compounded preparation itself is not FDA-approved, and no provider should imply otherwise.

You will notice this page does not tell you what TB-500 does. That is deliberate. Outcome claims about tissue, recovery, or athletic performance are exactly what a compliant provider will not make and an unregulated seller will make freely. Treat confident promises as information about the seller, not about the peptide.

Why sourcing is the entire question

With most prescription medications, the supply chain is invisible because it is uniform: an approved product, a licensed pharmacy, a pharmacist who checks it. With peptides sold online, the supply chain is the variable. Two vials labeled TB-500 can come from a licensed US compounding pharmacy that tests every batch, or from a seller with no pharmacy license, no prescriber, and no obligation to tell you what is inside.

Nothing on a product page distinguishes those two. Only the checks below do. Our longer guide to licensed clinics vs “research use only” sellers walks through the legal difference in more detail.

Seven checks to run on any TB-500 provider

A licensed clinician evaluates you before anything is prescribed
TB-500 is not an over-the-counter product. A legitimate provider puts a licensed clinician between your intake and your prescription, and that clinician is allowed to say no. If you can add a vial to a cart and check out without any medical review, you are not buying prescription care.
The clinician is licensed in your state, and you can confirm it
Ask for the prescribing clinician’s name, credential, and license number. Every state medical or nursing board publishes a free license lookup, and the check takes a couple of minutes. A provider that treats this question as unusual is telling you something.
A licensed US pharmacy dispenses it, and you are told which one
Prescription peptides should be prepared by a licensed compounding pharmacy, not shipped from an unnamed facility. You should be able to learn the dispensing pharmacy’s name and verify its license with that state’s board of pharmacy. If nobody will name the pharmacy, treat that as the answer.
The product is not labeled “research use only”
This is the clearest line in the whole market. Products sold as “research use only” or “not for human consumption” are, by their own labeling, not intended for people. That label is how a seller sidesteps prescription and pharmacy rules while the vial on the website looks identical to a pharmacy preparation.
Independent testing exists, and you can see it
Ask whether preparations are tested by an outside laboratory for identity, purity, and sterility, and ask to see documentation tied to the batch you would receive. A certificate of analysis for some other lot, or a generic PDF with no batch number, does not tell you what is in your vial.
Bloodwork and medical history are part of the process
A provider that never asks for labs or a medical history has no way to know whether a peptide is appropriate for you, what else you take, or what should be monitored. Labs are also how a clinician decides against prescribing, which is a real and expected outcome.
Pricing, refills, and cancellation are written down before you pay
You should be able to see the medication price, any membership or visit fee, what lab work costs, and how to cancel — all before checkout. Hidden auto-refills and cancellation-by-phone-only are the two friction tactics worth screening for.

How Meto approaches each point

A checklist you cannot use on the provider who wrote it is not worth much. Here is where Meto lands on each one, in the same order.

Clinician evaluation: Licensed clinicians evaluate every patient; prescriptions at clinician discretion. Completing an intake does not guarantee a prescription.
Pharmacy and dispensing: Filled by licensed US 503A compounding pharmacies; dispensing pharmacy details arrive with your medication and can be verified with the state board of pharmacy
Labs first: Every protocol starts with bloodwork: a $149 one-time Peptide Readiness Panel (or upload recent labs).
Where TB-500 appears at Meto: TB-500 is prescribed at Meto within one protocol, $249–349/mo, paired with BPC-157 — and only when a clinician decides it is appropriate after reviewing your labs and history.
Membership and cancellation: $29/mo membership. Cancel anytime from your account; no cancellation fee. Unlimited care-team messaging + quarterly clinician consults (membership).
Shipping: Cold-chain shipping included, 3–5 days from a licensed US 503A compounding pharmacy.
Payment: HSA/FSA eligible for most members; check your plan administrator for your account’s rules.

Full pricing, inclusions, and prescribing details live on the protocol page. You can also read the single-molecule pages for TB-500 and BPC-157, or the side-by-side at BPC-157 vs TB-500. Whether either is appropriate for you is a decision a clinician makes after an individual evaluation.

If you are a tested athlete, start here

Thymosin beta-4 and its fragments, including TB-500, appear on the World Anti-Doping Agency Prohibited List among growth factors and related substances, prohibited at all times — in and out of competition. Many national governing bodies, collegiate associations, and professional leagues adopt the WADA list or maintain their own.

If you compete under any drug-testing program, check your sport’s current prohibited list before you talk to a provider, and tell any clinician you speak with that you are tested. A provider who markets a WADA-prohibited peptide to competitive athletes without raising this is not one to buy from.

Red flags worth walking away from

No prescriber anywhere in the process — just a checkout page.
“Research use only” or “not for human consumption” printed on the label or buried in the terms.
The dispensing pharmacy is never named, or the answer changes when you ask twice.
Test results are promised but never produced, or are not tied to a batch number.
Claims about what the peptide will do for your body, stated with certainty.
Prices that only appear after you enter payment details.
Pressure to buy multiples, or a discount that expires while you are reading.

None of these require expertise to spot. They only require asking before you pay, and being willing to leave when the answers are vague.

What to ask, in your own words

Copy these into a message to any provider you are considering. The quality of the reply is the test — a licensed provider answers all five in a paragraph, because the answers are already true.

1
Which licensed clinician would prescribe for me, and in which state are they licensed?
2
Which pharmacy dispenses the medication, and can I verify its license with the state board?
3
Is the product labeled for human use, or as research use only?
4
What independent testing is done, and can I see results for the batch I would receive?
5
What is the total cost — medication, membership, labs — and how do I cancel?

Compounded medications are prepared by licensed pharmacies based on a prescription and are not FDA-approved. Prescriptions are issued at a licensed clinician’s discretion after an individual evaluation — completing an intake does not guarantee a prescription. Patients receive the dispensing pharmacy’s details with their medication, which can be verified with the relevant state board of pharmacy.