I have been trying Sunday Natural D3 + K2 in pills for a while now and have not seen the blood results I was looking for. I just switched to D E K A drops from Sunday Natural, as I also need to supplement Vit E and A. I do not have any results on this yet. What I do notice is that it is harder for me to stay on track with drops, as I have all other supplements in pills in a pillbox, and the drops do not really blend into the routine.