Healthy Immune Function Naturally Occurring Immunoglobulins and Lactoferrin Non-GMO A Dietary Supplement Kosher Dairy General Health Family Owned 1968 GMP Quality Assured Colostrum 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 offers 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 may help to enhance bioavailability and absorption of nutrients into the body, while promoting healthy gastrointestinal function.