Spend $100 and get free shipping Australia wide! Colostrum - 100% Pure Grass Fed Bovine. Colostrum is the first form of milk produced by cows immediately following the delivery of a newborn. It is high in antibodies, particularly Immunoglobulin A (IgA), packed with immune cells, growth factors, and nutrients and is lower in fat but rich in proteins, carbohydrates, vitamins, and minerals. Colostrum boosts immunity, promotes gut health and supports muscle growth and development.