No online seller is "official": as of October 2026, retatrutide is not authorized as a medication in France, the European Union, or the United States. What circulates under the name ofR3PeptiLine is a research peptide, and its quality depends entirely on the seller. Reliability isn't something you claim; it's something you verify. Here are seven checks to perform before ordering, along with what PeptiLine publishes for each.
Retatrutide 10 mg – €59.90See our certificates of analysis
The essentials
The 7 checks
1. A batch analysis report, not a generic "certificate".
A serious report includes a number, an analysis date, the name of the sample, and alot numberA document without a batch number, or the same PDF shown for all products, does not certify anything: it may be several years old or concern another manufacturer.
2. A report that can be verified by the laboratory
The Janoshik reports carry averification keySeized onjanoshik.com/verifyIt displays the original report from the lab's website, bypassing the seller. If the key is missing, blurred, or if the seller refuses to provide it, the report may have been altered. To read the figures themselves, seeHow to read an HPLC analysis certificate.
3. The batch in the report is that of the bottle
The only link between an analysis and your package is the batch number. Compare the one on the label with the one on the report. A seller who doesn't put a batch number on their bottles cannot link their analyses to what they ship.
4. A measured quantity, not just purity
HPLC purity indicates what proportion of the powder is actually retatrutide. It does not tellHow muchThere are some. A good report also gives the mass measured in the vial: for our 10 mg vials, Janoshik measured between 11.46 and 11.74 mg. An underdosed vial can display 99% purity and contain half the product.
5. Lyophilized powder in a sealed vial
Research retatrutide is available as a lyophilized powder, which is more stable than a solution. The ready-to-use "R3 pens" sold online do not correspond to any official product: the liquid they contain is rarely analyzed, and any analysis reveals nothing about its storage conditions since manufacture. Retatrutide is also not available in tablet form.
6. An identifiable company and secure payment
Legal notices, address, contact email, terms of sale: a reliable seller is reachable. Payment by credit card gives you recourse with your bank. Be wary of sales settled solely by bank transfer to an individual, cryptocurrency, or messaging.
7. No promise of results
Retatrutide is not an authorized medication: a seller who promises weight loss, provides a dosage, or presents the product "for weight loss" is acting outside the bounds of research. This is often a sign of a seller who also lacks expertise in other areas.
Warning signs of a fake R3
| Signal | Why this is a problem |
|---|---|
| SignalSale by TikTok, Telegram or WhatsApp, without site | Why this is a problemNo traceability, no recourse. We tell a true story inthe TikToker and his street vendor. |
| SignalReport without a key, blurred, or in screenshot format | Why this is a problemImpossible to verify in the laboratory. |
| SignalSame report for all products or all batches | Why this is a problemIt does not match what you receive. |
| SignalBottle without batch number | Why this is a problemNo possible link between an analysis and the bottle. |
| Signal“R3 pen” or “R3 tablet” | Why this is a problemThese forms do not exist outside of Lilly's clinical trials. |
| SignalVery low price with no supporting evidence | Why this is a problemThe cost of a batch analysis is part of the price of a verified product. |
| SignalDosage, before/after, promised weight loss | Why this is a problemSales pitch, not research. |
In July 2026, the ANSM (French National Agency for Medicines and Health Products Safety) issued a warning about products sold online under the name retatrutide. These checks do not make a product "authorized"; they only allow consumers to know what the bottle contains.
Our reports retatrutide
Each batch of retatrutide sold by PeptiLine is analyzed byJanoshik, independent laboratory. Batch 777333 was analyzed twice, one month apart: 99.940% then 99.820%, two consistent measurements.
| Product | Batch | Analysis | Quantity measured | HPLC Purity | Report |
|---|---|---|---|---|---|
| ProductRetatrutide 10 mg | Batch777333 | Analysis11/09/2026 | Quantity measured11.46 mg | HPLC Purity99,820 % | Report#229261 |
| ProductRetatrutide 10 mg | BatchMP-VIAL77711 | Analysis25/08/2026 | Quantity measured11.74 mg | HPLC Purity99,922 % | Report#223430 |
| ProductRetatrutide 10 mg | Batch777333 | Analysis11/08/2026 | Quantity measured11.55 mg | HPLC Purity99,940 % | Report#216554 |
| ProductRetatrutide 20 mg | BatchMP-777RT202 | Analysis14/10/2026 | Quantity measured22.78 mg | HPLC Purity99,446 % | Report#241205 |
| ProductRetatrutide 20 mg | BatchMP-777RT201 | Analysis01/09/2026 | Quantity measured23.33 mg | HPLC Purity99,852 % | Report#226146 |
| ProductRetatrutide 20 mg | Batch777521 | Analysis05/08/2026 | Quantity measured23.40 mg | HPLC Purity99,778 % | Report#214175 |
Each report opens with ourcertificates pagewith its verification key, to be entered at janoshik.com/verify.
Order from PeptiLine
Retatrutide 10 mg – €59.90Retatrutide 20 mg – €99.90Compare the kits
Frequently Asked Questions
Is there an official supplier of retatrutide?
No. As of October 2026, retatrutide is not authorized as a medication in any European Union country or in the United States. The products sold online are research peptides: their reliability is judged by published batch analyses, not by authorization.
How to verify a Janoshik certificate?
Note the report number and verification key, then enter the key at janoshik.com/verify. The lab's website displays the original report: compare the sample name, lot, date, quantity, and purity with those shown by the vendor.
Is a ready-to-use R3 pen safer than a bottle?
No. No retatrutide pen is officially marketed. The pens sold online contain a rarely analyzed solution, more fragile than the lyophilized powder, and whose preparation date and storage conditions are unknown.
Why does a 10mg vial contain more than 10mg?
Manufacturers fill slightly above the stated value to compensate for handling losses. In our 10 mg batches, Janoshik measured between 11.46 and 11.74 mg. Conversely, a bottle significantly below the stated value is a warning sign.
Where can I buy research retatrutide in France?
PeptiLine ships from its warehouse in France, with a Janoshik report published for each batch and the batch number printed on the bottle. Delivery in 3 to 5 business days. The products are for scientific laboratory research use only.
- Guide to the Retatrutide— the peptide, its mechanism and the state of research
- Recognizing a reliable supplier— 7 checks to avoid a fake R3 (you are here)
- Kit retatrutide— what each pack contains and the price per mg
- Retatrutide conservation— powder, reconstituted solution and transport
- Delivery of retatrutide— Delivery times, tracking, customs and countries served
- Retatrutide or tirzepatide— mechanisms and results of comparative trials, with cagrilintide
- Reconstitute a lyophilized peptide— the step-by-step manipulation in the laboratory
- Certificates of analysis— the Janoshik reports for each batch, with their key
Janoshik reports published on peptiline.fr; regulatory status as of October 29, 2026. PeptiLine products are intended exclusively for scientific laboratory research. This page does not provide medical advice, protocols, or dosage information.