Wombaroo Impact Colostrum 250g. Colostrum is the first milk produced after birth, containing high levels of immunoglobulins and antibacterials, that provide immunity and intestinal protection to young animals. Impact Colostrum Supplement is made from powdered bovine colostrum with added whey protein, lactalbumin, omega-3 and omega-6 fatty acids, vitamins and minerals. Feed Impact to newborn animals or marsupial joeys as a replacement for or as an adjunct to milk replacers.