My vitamin d was so low cleveland clinic has be take 50000 units a week for 8 weeks. that brought it up to the bottom of the range. i now take 10000 per day to maintain my level. why do i need so much. i get regular sun exposure?

Probably don't need: There i s much debate regarding how much vitamin d a person needs. Some say below 10 is deficiency, others below 30, while even others say below 40. It is fat soluble vitamin which means it may be stored in fat and not always detectable in the blood. Try wild salmon and fortified foods and don't exceed 1, 000 iu per day. If you don't have any symptoms that should be okay. Try another lab as well.