Factors that increase the risk of vitamin d deficiency include:
1.skin color
2 where one lives
3.the ability to absorb vitamin d
4.sun exposure
5.medical conditions
6.body weight
TOO MUCH VITAMIN D CAN LEAD TO HEALTH PROBLEMS.
One may experience stomach discomfort, unusual mental symptoms, or kidney problems.
It appears that levels of the vitamin greater than 100 ng/ml may be harmful.