However, it does not mean the Zylophin RX
product is 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 vitamin E that I will be throwing in the garbage!