Author(s):
Cristiane Ferreira*, Irfan Khan, Amit Badshah and Parag Singhal
Vitamin D is a group of fat-soluble molecules responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and multiple other biological effects [1]. High levels of 25(OH) vitamin D can therefore cause refractory hypercalcemia. Suboptimal levels of serum Vitamin D are a global healthcare issue