VisiprimeThe USP (United States Pharmacopeia) is a non profit organization that sets standards for medicines, food ingredients, and dietary supplements manufactured, distributed and consumed worldwide. You will see their label (USP) on Visiprimebottles of supplements that they have tested. Their stamp means they have tested the product and approved it according to their testing. It means the product has met their standards. However, it does not mean the Visiprimeis what you need. As an example, I have a bottle of vitamin E pills that contains the USP stamp. But, the vitamin E in the bottle is the synthetic type. This is stated as the main ingredient on the bottle label. The synthetic type (di-alpha tocopheryl acetate) is not recommended by nutrition experts. So I have a bottle of vitamin E with the USP stamp of approval on it. A bottle of VisiprimeE that I will be throwing in the garbage!