Lactoferrin is a milk protein that binds and transports iron. Most supplements use lactoferrin from cows milk.
People take it to support immune defenses and keep the intestinal lining healthy. Some data hints at skin benefits, though more study is underway.
Typical use is once or twice a day on an empty stomach to improve absorption. Anyone with a cows milk allergy should be careful. This protein can shift how the body handles iron, so speak with a professional before pairing it with iron supplements.