Hey Cam. No problemo, I'll admit that I've never personally researched St John's Wort before. I was going solely by word of mouth and I guess I was just lucky this time that they had done their research. Quite often I turn out to be wrong and it does indeed seem that the issue is more controversial than I thought it was.

I have heard that getting decent products can indeed be a problem. I could be completely wrong on this... But I have some notion that it might be the case that Canadian laws on non-prescription medications are tighter than the US (with respect to false advertising on the bottle) and thus I've heard that a number of people choose to purchase St John's Wort through Canadian rather than USA sources. But that could be a folk notion. I have no idea. I'm from the Southern Hemisphere and I have no idea what the situation here is (unregulated I guess but I don't know).

I didn't know about the Cochrane library, so thanks for that.