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. Though human colostrum ("first milk") has the highest concentration, followed by human milk, then cow's milk, lactoferrin is found throughout the human body. Published studies examining lactoferrin as a supplement and its beneficial effects on immunity have been quite promising. Studies show that apolactoferrin, the iron-depleted form of lactoferrin, has unique benefits and may be superior to lactoferrin for supplementation.
Controls level of free iron in the blood
Contains apolactoferrin, the iron-depleted form of lactoferrin
Conveys beneficial effects on immune function
Helps maintain a proper level of "good" bacteria in the intestinal tract