What does it mean that the lactoferrin content of healthy lactoferrin protein powder is 7.0 mg?

It means that the lactoferrin content accounts for 7.0 mg in grams. According to relevant data, the content of lactoferrin in lactoferrin protein powder is 7.0 mg, which is a relatively high standard. Lactoferrin is a non-heme iron-binding glycoprotein, which is mainly expressed and secreted by mammary epithelial cells and exists in milk, body fluids and neutrophils of many mammals. It is an important part of mammalian immune system.