(Naturade) As nature’s first food, Colostrum contains compounds and proteins known to help stimulate the immune system. It is a rich source of IgG and PRPs (proline-rich polypeptides) and supplies 600 mg of immune factors, growth factors, vitamins, and minerals to promote health and vitality. Also contains Arabinogalactan, Beta 1-Glucan, Lactoferrin, and Olive Leaf Extract. Start with Colostrum Plus Immune, then move to Colostrum Plus for maintenance. 1 month supply.