Colostrum is the first milk produced by mammals after giving birth. It is rich in essential vitamins and minerals, biologically active proteins, essential fatty acids, as well as growth factors and immune factors. Now Foods Colostrum is a bovine-derived colostrum supplement that supports healthy immune system, maintains lean muscles, and promotes healthy gastrointestinal system. visit us: http://www.tasmanhealth.co.nz/now-foods-colostrum- 500mg/ for more details!!