Guide
Fake GLP-1 in Vietnam, and how to check what you actually bought.
Semaglutide and tirzepatide are the most counterfeited compounds in this market, because demand is high and the price gap between real and fake is enormous. Here is what the fakes look like and which checks are worth doing.
Why this market in particular
Vietnam sits next to the largest grey-market synthesis capacity in the world, and prescription GLP-1 products are both expensive and hard to get here through official channels. That combination produces two separate problems that often get confused with each other.
The first is counterfeit branded product: boxes and pens made to look like Ozempic or Mounjaro, sold at a discount to the pharmacy price. The second is mislabelled research material: a vial sold as semaglutide that contains less than the stated mass, a different compound, or mostly excipient. They need different checks.
What counterfeit branded pens get wrong
Counterfeit pens are usually good enough to pass a glance and fail a comparison. Print quality on the carton is the usual tell: fuzzy edges on small type, colour that is slightly off against a genuine box, a batch number that is printed rather than laser-etched where the real one is etched.
The dose window and click mechanism are harder to fake than the box. A pen that turns without defined clicks, or whose window shows a dose that does not match the number of clicks, is not genuine. Neither is a pen whose expiry on the pen body disagrees with the carton.
The strongest signal is not physical at all. Genuine branded product moves through a licensed importer and a licensed pharmacy. If the seller cannot say which importer and cannot produce an invoice showing that chain, the physical inspection is beside the point.
What mislabelled research material gets wrong
Research-grade vials have no branded packaging to counterfeit, so the failure mode is different: the label says 10 mg and the vial holds 6 mg, or holds a cheaper compound with a similar profile. Nothing about the vial's appearance will tell you this.
A lyophilized peptide should be a compact cake or a fine even powder, sitting as a small puck at the bottom of the vial. A vial that arrives as loose drifting dust, or with the cake shattered and stuck to the walls, has usually been through heat or rough handling. That is a handling problem rather than proof of fraud, but it is worth raising before you pay.
The only check that actually settles composition is a third-party assay of that batch. Everything else is inference.
The checks that are worth doing
Ask for the certificate of analysis for the specific batch you are being sent, before payment. Not a certificate for the compound in general, and not one with the batch number cropped out. A supplier who tests will have this ready; a supplier who does not will offer something else instead.
Check that the report names the lab, the date, the batch, and the method. HPLC for purity and mass spectrometry for identity are the two that matter. A purity figure with no method behind it is a number someone typed.
Ask what the seller does when a batch fails. The answer tells you whether testing is a policy or a marketing line.
Compare the price against the market honestly. Real material has a floor cost. An offer far under everyone else is usually explained by mass, not by generosity.
How we handle it
Our batches are tested by independent labs, with 99.1% average HPLC purity across tested batches. You can ask for the certificate for your batch in Telegram and get it before you pay rather than after.
The retatrutide certificate is published on its product page so you can see the format before you ask for one. Availability, the final amount in VND and the delivery window are confirmed in writing before any payment.
Common questions
How can I tell if semaglutide is real without a lab?
You cannot confirm composition without an assay. What you can do is check the paperwork chain: a batch certificate naming the lab, date, batch number and method, and for branded product an invoice showing the licensed importer. Physical inspection catches only the crude fakes.
Is cheap GLP-1 in Vietnam always fake?
Not always, but price is informative. Research-grade material is legitimately cheaper than branded pharmacy product because it has no brand, no pen and no prescription chain behind it. An offer far below other research suppliers is a different signal and usually means underfilled or substituted material.
What is a certificate of analysis supposed to contain?
The compound, the batch number, the date, the testing laboratory, the methods used and the results. HPLC gives purity, mass spectrometry confirms identity. A certificate missing the batch number cannot be matched to what you are holding.
Do you show a COA before payment?
Yes. Ask in Telegram for the batch certificate on the item you want and you get it before you pay. The retatrutide one is already published on its product page.