The ideal range is 50-100
I asked my doc specifically for D3 and zinc levels and he added magnesium. Reference level for D3 is 30-100 ng/mL and I came in at 50.8. Magnesium is 1.6-2.3 ug/dL and I came in at 1.9. Zinc is 44-115 ug/dL and I was 77. Calcium is 8.6-10.2 mg/dL and I was at 9.4.
K2 to keep the calcium in the bones and not the arteries is important. There is a such thing as too much vitamin D and calcium issues are the result. Ask to check your levels in your usual bloodwork.