https://www.webmd.com/vitamins/ai/ingredientmono-49/lactoferrin
“How does it work?
Lactoferrin helps regulate how well iron is absorbed into the body from the intestine.
It also seems to protect against infections from bacteria, viruses, and fungi. Lactoferrin seems to slow down the growth of bacteria by starving them of nutrients. It also destroys the walls around the bacteria. The lactoferrin contained in mother’s milk is thought to help protect breast-fed infants against infections.
Lactoferrin also seems to be involved with the production of blood cells and how well the body fights off infections.”