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Online clinic or research-use shop: what you are really buying.

Peptide Chooser editorial team. Checked 2 Nov 2026.

Short answer

An online clinic sells a prescription medicine after a visit with a prescriber; a research-use shop sells vials labeled for lab research, not for people.12 They are not the same product, even when the substance has the same name. Of the 172 FDA warning letters on our letters page, 109 went to telehealth companies and online clinics and 20 to research-use peptide shops.3

What are the two kinds of seller?

Online clinics connect you with a prescriber online. If the prescriber agrees, a pharmacy sends you either a brand medicine, such as Wegovy, or a pharmacy-made (compounded) copy.2

Research-use shops sell peptides as powder in vials, labeled "for research only". There is no prescriber, no visit and no pharmacy; the label says the product is not meant for people.

We track 15 online clinics and 81 research-use and cosmetic shops.4

What may each one sell?

A clinic's medicines come from a pharmacy on a prescription. A brand medicine is FDA approved: its maker sent trial data and the FDA checked it.1 A compounded copy is not FDA approved, and the FDA does not check its safety, effectiveness or quality before it is sold.2

A research-use shop's vials are not approved for use in people. Many of the peptides they sell are on the FDA's list of substances that may be risky to compound, or were withdrawn from its review.8 Our guide Are peptides legal in the US? explains the four kinds.

What do our five checks mean for each?

We check both kinds the same way: Lab reports, No FDA letter, Company found, Legal pages and Fresh prices.9

  • Lab reports are a shop check. In our data no online clinic has a lab report, so a clinic misses this check; that says nothing about the pharmacy behind it.
  • No FDA letter, Company found and Legal pages mean the same for both.9
  • Fresh prices means our own crawl saw a current price on the seller's site in the last 30 days.9

Our guide on how we check sellers explains each check with an example.

Which kind gets FDA warning letters?

Both. Of the 172 letters on our letters page, 109 went to telehealth companies and online clinics, 20 to research-use peptide shops and 11 to compounding pharmacies.3

A letter is the FDA's formal notice, not a court ruling; a seller with a letter is still listed, and its page links the letter.10

How do the prices compare?

Semaglutide shows the gap. At the online clinics we track, a compounded semaglutide plan starts at $60 a month5 and a Wegovy plan at $149 a month6. 39 research-use shops list semaglutide powder, with a middle price of $7.90 per mg.7

These numbers cannot be compared. A clinic price is for a month of a medicine with a prescriber; a shop price is for powder in a vial that is not meant for people, with no prescriber and no pharmacy behind it.

What should you ask an online clinic?

  • Is the medicine the brand, or a copy made by a pharmacy? Only the brand is FDA approved.2
  • Which pharmacy makes or sends it, and in which state is it licensed?
  • Is the price all-in, or is there a monthly care fee on top?
  • Has the clinic had an FDA warning letter? Our letters page lists them.

What if something goes wrong?

With a clinic, you have a prescriber to call and a pharmacy that filled the prescription. With a research-use vial, there is no prescriber and no pharmacy, and the label says the product was never meant for people.

Either way, you or your doctor can report a side effect to the FDA through its MedWatch program.11

So which should you buy from?

That is a medical decision, not a shopping one. Only a clinic gives you a prescriber and a pharmacy; only a brand medicine has FDA approval. A research-use vial is not meant for people.

Our weight loss page lists the clinic plans, and each shop on our goal pages has its five checks. None of this is medical advice.

What to do next

Compare clinic pricesHow we check sellers

Sources

  1. FDA, Development and Approval Process: Drugs: https://www.fda.gov/drugs/development-approval-process-drugs
  2. FDA, Compounding and the FDA: Questions and Answers: https://www.fda.gov/drugs/human-drug-compounding/compounding-and-fda-questions-and-answers
  3. Peptide Chooser, FDA warning letters to peptide sellers, compounders and online clinics, checked 2 Nov 2026
  4. Peptide Chooser, Peptide sellers and their checks, checked 2 Nov 2026
  5. Mochi Health, Compounded Semaglutide, 2 Nov 2026: https://joinmochi.com/lp/per-dosage-pricing
  6. Alloy, Wegovy Pill, 2 Nov 2026: https://www.myalloy.com/weight
  7. Peptide Chooser database: the research-use and cosmetic peptide shops we check, 2 Nov 2026. Their prices and checks are in the seller windows on our goal pages
  8. FDA, Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks, current as of 22 Apr 2026: https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks
  9. Peptide Chooser, How we rate peptide products and sellers
  10. FDA, About Warning and Close-Out Letters, current as of 20 Mar 2024: https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/about-warning-and-close-out-letters
  11. FDA, FDA's Concerns with Unapproved GLP-1 Drugs Used for Weight Loss, current as of 1 Oct 2026: https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/fdas-concerns-unapproved-glp-1-drugs-used-weight-loss