You would be surprised how many items in Costco are different in Canada than the US.
Something that is even slightly "medical" may have different Health Canada Stanrds to be meet to be able to be sold in Canada. Just like electrical equipment has to have the Little "c" beside the UL (or whatever) seal to be leagl here. (For the states it has to have a "US")
Charles MacDonald firstname.lastname@example.org
I still live just beyond the fringe in Stittsville