China, naturally. And, yes, I know where you're going with that. All I can say is that I did some research into the brand I chose (which is actually a local company) and their oversight and testing of their products. Some companies simply rebrand bulk imports, whereas this one actually has an engineer living in Shenzhen who has been working with the factories to develop a custom product. So do I trust it as much as an American-made carto? No, but there are no American-made cartos. Do I trust it more than other Chinese-made cartos? Yes. Do I trust it more than American-made cigarettes? Yes.
Juice is another matter. I believe that theirs is sourced from Dekang (awaiting confirmation), which again, I find to be the lesser of evils for various reasons. I am researching other options and tooling up for DIY blends, but that is also a road fraught with peril. For reasons I won't get into here, I don't implicitly trust American manufacturers any more than I trust Dekang. But I still have a lot of homework to do. In the meantime, I am still convinced that it is a likely harm reduction over cigarettes.