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The key considerations when evaluating a Canadian supplier are third-party testing certificates (verifying purity and identity of the compound), domestic shipping (which eliminates customs complications), and clear product information including batch certificates of analysis

Liver and kidney markers are reasonable to track in extended high-dose protocols

Testing goes further than the standard, too, with every lot clearing HPLC, LC-MS identity confirmation, and an endotoxin check before that certificate gets posted, so the COA youre reading isnt just a purity number

In our experience working with researchers in this space, the most common dilution error is adding water to reach a 'convenient' syringe marking without calculating concentration first