Agree walbrook, I posted back in dec if anyone was taking K2 M7 with their D3..... nobody answered. I have been on D3 and K2m7 since and Mag. Funny thing is ten years ago a chemist said I was low on D3 ..... just by looking at me? Told my Doc and was tested..... was 10 Have had a blood test six month later and got to 100. Not been tested since and stopped D3 so do not know what I have been for the last 8 years. Stared taking D3 late last year 6000 units ... doc knows.... with K2