Pfizer Pure Milk meets the standard of real pure milk. It is made from the colostrum extract of purebred Holstein cows in Australia, and through a strict production process, the content of immunoglobulin and lactoferrin in dairy products is significantly higher than that of ordinary milk. This Pfizer milk has no added preservatives, thickeners and food flavors to ensure that the product is truly additive-free and meets the definition of pure milk.