(Apolactoferrin) Supports a Healthy Immune System Dietary Supplement 1 Daily Non-GMO Lactoferrin is one of the transferrin proteins that transfer iron to the cells and control the level of free iron in the blood and external secretions. It has antimicrobial activity and is part of the innate defense. In particular, lactoferrin provides antibacterial activity to human infants. Though human colostrum (“first milkâ€