I hope you're not. The "USP Grade vs USP Certified" labeling, I think, is more to circumvent the law, rather than make the product more attractive. You can probably state that the product falls within USP guidelines but not manufactured at a USP certified company and get away with it. BUS111 tells you testing and certification adds to the cost of production and that if you don't do it, you have more profit. Most people don't use glycerin for vaping (most is in soaps and lotions etc) so there probably isn't an issue for those purposes. Companies that sell correctly will give you specs, info etc up front and their products will be labeled correctly. They take a certain amount of pride in their product and their standing in their industry. I have to agree with markarich159 about knowing what you are using, the criteria for labeling and what people will do to market a product.
I posted on a smilar thread, that I surfed for about 1/2 hour and saw a lot of facts and a lot of crap. Somehow I would trust a pharmacist's facts over just a product label.
