Guide
Retatrutide in Canada: what's legal, what's sold
Retatrutide is sold in Canada as a research chemical for lab use. What that means legally, what a supplier can say, and how to check a vial is really it.
Published September 23, 2026
Retatrutide is sold in Canada as a research chemical for laboratory use, and that is the only form pepuro sells it in. A research vial of retatrutide is not a medicine, whatever stage Eli Lilly's clinical program has reached.
| Peptide | Vial sizes | From |
|---|---|---|
| Retatrutide | 5mg, 10mg, 20mg, 30mg, 40mg, 50mg, 60mg | $53.99 CAD |
| Tirzepatide | 5mg, 10mg, 15mg, 20mg, 30mg, 40mg, 50mg, 60mg | $42.99 CAD |
| Semaglutide | 5mg, 10mg, 20mg, 30mg | $42.99 CAD |
Free shipping across Canada. Every vial ships with a QR code linking to its own batch lab report. See all peptides
What retatrutide is
Retatrutide is a synthetic peptide that activates three receptors at once: GLP-1, GIP and glucagon. It was developed by Eli Lilly under the code LY3437943, and it adds the glucagon receptor to the GLP-1 and GIP pair that tirzepatide targets.
| Receptors | GLP-1, GIP, glucagon |
| Developer | Eli Lilly (LY3437943) |
| Formula | C221H342N46O68 |
| Molecular weight | 4731.32 g/mol |
| CAS | 2381089-83-2 |
| Vial sizes we sell | 5, 10, 20, 30, 40, 50 and 60 mg |
Semaglutide vs tirzepatide vs retatrutide lays out how the three compare receptor by receptor.
Is research-grade retatrutide legal in Canada?
Research peptides, retatrutide included, are bought and sold in Canada as research chemicals intended for laboratory use. What is not permitted is marketing, selling or using them as drugs for human consumption. The line is intended use, not the molecule. Are research peptides legal in Canada? covers that distinction in full.
Two things follow for retatrutide specifically:
- A research vial carries no drug approval, whatever happens to Lilly's program. If a retatrutide medicine is ever approved in Canada, it will be a separate, prescribed product, not a research vial.
- For the current status of any drug in Canada, Health Canada's Drug Product Database is the authority, not a supplier's website.
This page is general information, not legal advice.
What a research supplier can and cannot say
| A compliant supplier | A red flag |
|---|---|
| Describes the molecule: receptors, mass, sequence | Gives dosing or "protocol" advice |
| Publishes a lab report for every batch | Shows one generic report for every batch |
| Sells for research use and says so plainly | Promises weight loss or other human results |
| Names the lab that tested it | "Lab tested" with no lab named |
pepuro sells retatrutide with the same terms as the rest of the catalog: research use only, confirmed at checkout.
How to check a retatrutide vial
Retatrutide's mass, 4731.32 g/mol, sits far enough from semaglutide (4113.58) and tirzepatide (4813.45) that a mass-spec line tells the three apart. Its report should show:
- an observed mass near 4731.32
- purity at 99% or higher by HPLC
- a batch number that matches the vial
- a named, independent lab
The QR code on every pepuro retatrutide vial opens the report for that exact batch. How to read a peptide lab report walks through each line, and the retatrutide handling guide covers reconstitution and storage.
Buying it in Canada vs importing it
A vial bought from a Canadian supplier ships domestically, with no customs hold and no import fees at the door. Ordering from the United States adds both, and a parcel held at the border can sit for weeks. Importing research peptides from the US breaks down what that costs, and buying research peptides in Canada covers the domestic side.
Every retatrutide vial from pepuro ships free, from our Calgary, Toronto and Vancouver distribution centers, the same business day your e-Transfer clears, with a QR code on the vial that opens its independent, third-party lab report.
For research use only. Not for human or animal consumption.
Frequently asked questions
Is retatrutide available in Canada?
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Research-grade retatrutide is available in Canada from research chemical suppliers, sold for laboratory use only. It is not sold as a medicine by those suppliers, and nothing about a research vial makes it one.
Is retatrutide approved by Health Canada?
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Research-grade retatrutide is not a Health Canada-approved drug. Retatrutide the drug candidate is Eli Lilly's, and its regulatory status is set by Lilly's own clinical program. For the current status of any drug in Canada, check Health Canada's Drug Product Database.
Can a supplier tell me how to use it?
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No. A research supplier can describe what the molecule is and prove what is in the vial. It cannot give dosing, human-use or weight-loss advice, because that would be marketing it as a drug.
How do I know a vial is really retatrutide?
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Check its lab report. The observed mass should sit near 4731.32 g/mol, purity should be at or above 99% by HPLC, and the batch number should match the vial. A named third-party lab should have run the test.
Related articles
- Semaglutide vs Retatrutide: one receptor or threeSemaglutide is a 31-residue GLP-1 analog. Retatrutide is a 39-residue triple agonist. 618 daltons and two receptors separate them.
- CJC-1295 and ipamorelin: why they are pairedA GHRH analog and a ghrelin agonist in one vial. Why the two are studied together, what each half does, and the molar concentrations once reconstituted.
- DSIP (delta sleep-inducing peptide) handling guideDSIP's numbers in one place: the nine-residue sequence, mass, where the name came from, vial sizes, concentration table and what its report should show.
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