Vitamin D supplements for those who are vitamin d deficient

 Anyone take Vitamin D3? How much is needed each day? I live in Canada. How many MG or IU do you take? Do you need to take it with K2 as well?
Thanks ​Anyone take Vitamin D3? How much is needed each day? I live in Canada. How many MG or IU do you take? Do you need to take it with K2 as well?
Thanks