Lactoferrin is a multifunctional iron-binding glycoprotein belonging to the transferrin family, primarily found in mammalian milk, saliva, tears, and other secretions. It plays a crucial role in the innate immune system by sequestering iron, thereby limiting bacterial growth, and exhibits antimicrobial, antiviral, and anti-inflammatory properties. With a molecular weight of approximately 80 kDa, it consists of two homologous lobes each capable of binding one ferric ion. Lactoferrin is used in nutritional supplements, infant formulas, and has potential therapeutic applications in treating infections and iron deficiency. Its structure includes glycosylation sites that influence its stability and function.