Thanks, Madisongrrl. I'm looking into this one: http://www.amazon.com/gp/product/B00...=A5W198TSQJIXA. There's some calcium too, though I don't need it. I couldn't find a pure K2 to add to a D3, and though I almost purchased the Thorne one - I usually do well with their purer products - it uses some oil I don't care for and uses MK4 for the K2, I believe, and MK7 is superior, at least from what I've read so far.