I need to up my vitamin K intake. Am already eating tons of kale and spinache ( and other green leafies) but that's only taking care of my K1. I'm mostly interested in mk4 of the K2 actually. And as far as I know goose liver ranks highest in terms of pure mk4 content (100%mk4). But I can only get my hands on Duck liver where I live ( trust me, I spent the whole weekend supermarket-hopping in hope to find the goose's :D).Would duck liver have a similar mk4 content? Googled my socks off, but couldn't get any wiser...