Study of Vitamin D Supplementation Tailored to Vitamin D Deficiency in Breast Cancer Patients

Tablet to suck: calcium 500 mg bid, cholecalciferol 200 IU bid

"Tablet: calcium 500 mg bid + 2 ml drinkable solution cholecalciferol 100 000 IU whose schedule of administration depends on vitamin deficiency level:~* 100 000 IU of vitamin D3 at D1, D15, D28 and D43 if 25-OHD level \< 10 ng/mL~* 100 000 IU of vitamin D3 at D1, D15, D28 if 10 ng/mL ≤ 25-OHD level \< 20 ng/mL~* 100 000 IU of vitamin D3 at D1 if 20 ng/mL ≤ 25-OHD level \< 30 ng/mL"