It is a rich source of passive immunity, and is given to immune deficient pregnant females to help them in fighting against opportunistic infections. It nourishes and help in proper growth of the baby. Lactoferrin and other antimicrobial agents help in building immunity. Colostrum also has important immune properties like antibodies, immunoglobulins and enzymes. When the immune system is temporarily stressed due to extended physical activity, being able to recover quickly can help increase performance, strength and stamina