My urologist checks my calcium and D3 every 3 months as part of all the other tests he runs every 3 months since I have been on ADT. As a result he prescribed 5000 iu d3 and 600 mg of calcium. My d3 was slightly low at first, but is now in the normal range because of the supplements. I take citracal brand calcium which is calcium citrate. As far as vitamin K2, I don’t supplement, but try to eat foods rich in it such as Gouda cheese, etc. Also spend 4 days a week lifting weights to help protect my bones.