With at least 30% immunoglobulin and high levels of IgM, IgA and lactoferrin along with natural growth factors, our bovine colostrum includes all the attributes that have made this nutritional blend so well known as a supplement with the potential to aid your body in a number of key areas. Our bovine colostrum includes high levels of IgG, IgM, and IgA immunoglobulins, antibodies critical for maintaining a healthy immune system and Gi tract.