For starters, their raw powders are tested for purity before they begin producing a batch of injectables. They have each batch of powder tested for purity BEFORE they begin production of their injectables. This means they actually know what they're starting with, in terms of potency. Then, they take the raw powder and begin the production process in their sterile lab, under 100% sterile conditions. Everything from the conversion of raw powder into an injectable to the sealing of the product in individual sachets is done under totally sterile conditions. Finally, after they produce the sachets, a random sachet of each separate injectable is sent out to an independent lab, for testing. Only after each batch is independently tested, is the product released for sale to the general public.