Lactoferrin is an iron-binding glycoprotein which exists in most of body fluids and secretory fluids, and it is one of the main ingredients of proteins in tear.

• 乳铁蛋白是一种可以结合铁离子的糖基化蛋白,它广泛存在于人体的多种体液和分泌液中,是泪液蛋白中的主要成分之一。