Before comparing prices, confirm that the listing identifies the material, the quantity, and any document tied to the specific lot. A short, repeatable checklist makes omissions visible without turning marketing language into evidence.
Start with identifiers you can reconcile
Record the displayed compound name, stated milligrams, whether it is a single compound or a blend, and the date you reviewed the page. If a report is provided, compare its product and lot identifiers with the physical label. A generic example report cannot establish results for another lot.
Use a pre-purchase record
| Listing | Name, components, quantity, price in CAD |
|---|---|
| Document | Lot identifier, report date, named methods and reporting laboratory |
| Scope | What each result measures — and what it does not |
| Operations | Only confirmed storage, payment and shipping details |
Keep authorization questions separate
A research-use listing is not evidence of authorization as a medicine. For a Canadian drug, check the specific product record in Health Canada’s database. An ingredient-name match alone does not connect an unrelated vial to that authorization. [Health Canada Drug Product Database]
Read omissions literally
When a listing does not state a specification, record it as “not stated.” Do not fill the gap with assumptions based on another seller, a similar label or a category name. Screenshots and dated notes make later comparisons easier when listings change.
Final check
- Save the listing and the supplied instructions.
- Reject unsupported assumptions about sterility, origin or performance.
- Ask for clarification when identifiers conflict or a specification is absent.