[null and void]

From what little I can gather from the article and posts the commercially available lactoferrin is from cow's (udder) milk, and the test were run with lactoferrin from breast (human) milk.

Another English language oddity, milk comes from the whole animal in the case of a cow, but only from an apparently distinct and stand-alone breast associated with a human mother. Go figure...

[Wonder Warthog]

As a chemist, I can say that “lactoferrin is lactoferrin” whether it comes from an udder or a woman.