You only take 30,000iu 2-3 times weekly??
I take 200,000iu of Biotech D3-50 which is 4/day broken into 4 doses, according to my labs.
You also need magnesium to help D absorb. I take 1000mg KAL brand magnesium glycinate daily, broken into 3 doses. Magnesium glycinate is best absorbed form...