Canada GLP-1 research-peptide class comparison: Sema, Tirz, Reta, Cagri
A side-by-side data sheet of the four most-ordered metabolic peptides at Pure North, with HPLC purity and lot history references.
In a Canadian research-peptide context, GLP-1 sits within the metabolic class of reference standards. This post collects what HPLC-verified labs need to source, store, and reproducibly use this material, sourced from public literature and Pure North's published lot history.
Why GLP-1 matters
Pure North publishes laboratory reports for the samples and vial sizes listed in Lab Results. Each report identifies its method, reference, area purity and measured content. Open the matching product page to check coverage for the size you select. A report does not cover every size or future lot; contact customer service if your vial reference differs. Bacteriostatic water has no COA.
Related product: Retatrutide 20 mg.
The protocol short-version
For Canadian research labs working with GLP-1 class reference standards, the lifecycle is: receive the vial (Canada Post Xpresspost transit averages ~4 days from dispatch), transfer immediately to a research-grade −20 °C freezer, reconstitute in sterile bacteriostatic water at the working concentration your protocol specifies, and use within a validated, material-specific stability window. Avoid repeated freeze-thaw cycles, the effect depends on the material and handling conditions.
Cross-batch reproducibility
Match the compound, vial size and lot or assigned reference before relying on a report. If a reference differs from the vial label, contact purenorthpeptides@proton.me for the documented connection. A report does not cover another size or future lot. Keep the original report and research records when investigating unexpected results; a published COA does not establish a retain-sample programme.
Where to source it in Canada
Pure North Peptides is Canadian-based and ships across Canada via Canada Post Xpresspost, orders are dispatched within 24-48 hours, with typical transit around 4 days. Free shipping over $300 CAD; flat $30 below that. Browse the catalog at /products/. Read more on storage and handling in our storage guide, our shipping policy, lot verification at /coa-verify/, or the public lot archive at /lab-results/.
For laboratory research use only. Reference information, not medical advice or human-use guidance.
