Lactoferrin is a protein that is found in both cow and human milk, according to WebMD. It is used to treat stomach and intestinal ulcers, diarrhea and hepatitis C.
Lactoferrin can help regulate the way iron is absorbed into the intestines and how iron is delivered to the cells. It is also used as an antioxidant and to protect against viral and bacterial infections. The lactoferrin in mother's milk is thought to help protect breast-fed infants from bacterial infections, and industrial agriculture uses lactoferrin to kill bacteria during meat processing, as stated by WebMD. It is also believed to boost the body's immune system.