Wombaroo Impact Colostrum 100g. Impact is a colostrum supplement to aid the immune function of newborn mammals and marsupial joeys. Key Features: Contains colostrum powder, a rich source of immunoglobulin which may assist with immunity. Added lactoferrin & lactoperoxidase which may provide antibacterial activity and intestinal protection. Contains mannan oligosaccharides (MOS) which may assist the growth of beneficial gut flora.