Colostrum is a breast fluid produced by humans, cows, and other mammals before breast milk is released. It is very nutritious and contains high levels of antibodies, the proteins that fight infections and bacteria. Colostrum promotes growth and health in infants and newborn animals, but research has shown that taking bovine colostrum supplements may promote immunity, help fight infections, and improve gut health throughout life. Bovine colostrum is similar to human colostrum; it is rich in vitamins, minerals, fats, carbohydrates, disease-fighting proteins, growth hormones, and digestive enzymes.