Fight back with Colostrum Plus! Nature provides an immune defense network, but your immune system is challenged by normal physical and mental stress, as well as aging. Colostrum Plus enhances normal immune factors, providing dual action-in the bloodstream and the GI tract, to help maintain a robust intestinal lining and promote healthy intestinal flora. Colostrum's naturally occurring growth factors may enhance stamina and support normal re-growth of lean muscle after strenuous physical exercise. Colostrum is a uniquely helpful supplement that contains Lactoferrin, Immunoglobulins and Proline-Rich Polypeptides (PRPs). Under the Symbiotics label, minimum levels of these components are verified by laboratory testing. Quality and Purity Assured. Colostrum Plus, exclusively from USDA Grade A dairies, and only from the first making, is laboratory tested to verify that it is free from hormones, pesticides, antibiotics and rBHT.