Colostrum 500 mg 120 vcaps by NOW FoodsColostrum is the nourishing fluid produced by mammals as food for the newborn in the few days after birth, before milk production begins. This bovine derived food supplement is rich in a variety of biologically active proteins, including immunoglobulins, Lactoferrin, and other factors that support the maintenance of lean muscle tissue, as well as a healthy immune system. Scientific studies have shown that Colostrum helps to increase bioavailability