I tried a cissus powder from some ayurvedic shop, and it gave me crippling heartburn, even at low doses, and even in caps. I ended up throwing it away. I assume CNW's is an extract of the actives or something while the stuff I got from the ayurvedic shop was just the powdered plant, but has anyone had any stomach discomfort from this? USP's never gave me any problems, anybody had any problems with CNW's? I like to have more than one option when I'm shopping, and I will probably get a bunch of other stuff too, and I don't want to pay shipping for more than one store. Cause I'm an unemployed bastard. :trout: