[speakeron]

You should take D3 with vitamin K2 (talk with your doctor first if you're on blood-thinning medications) to avoid calcium being dumped into soft tissues (K2 ensures it preferentially goes into bones).

It's a good idea to get your vitamin D status tested yearly and aim to be at least 50 ng/ml (120 nmol/l), but not more than 80 ng/ml (200 nmol/l).

As an example for dosages: I take about 7000 IU of vitamin D3 and 180 mcg of vitamin K2 daily. My levels test at about 180 nmol/l and my blood calcium is normal.

[voisin]

How did you determine that ratio of D3 to K2?