What's the actual difference between a compounded GLP-1 medication and the brand-name version?

Compounded versions are custom-made by a compounding pharmacy rather than manufactured by the original drug company, sometimes offered when brand-name supply is limited or as a lower-cost alternative. The key concern is that compounded products haven't gone through the same regulatory approval and quality testing process as the brand-name, Health Canada-approved medication, so dosing accuracy and ingredient purity can vary between compounding pharmacies in ways that don't apply to the approved product. References: https://obesitycanada.ca/healthcare-professionals/adult-clinical-practice-guideline/