Gastrogard-R_® is a non-sterile colostrum powder for oral use.  It is the colostrum collected from cows that have been hyper-immunised against rotavirus and contains concentrated proteins, including immunoglobulins, the primary immunoglobulin being IgG1.  Each sachet of Gastrogard-R_® contains 5g of hyperimmune bovine colostrum powder - anti-rotavirus, as the active ingredient.