- women currently pregnant or breast-feeding. - patients presenting acute impairment of renal function or nephrolithiasis. - patients presenting hypercalcaemia and/or hypercalciuria - patients presenting pseudohypoparathyroidism - use of any vitamin d supplementation alone or in association at screening visit; - use of any prohibited medication as detailed in the concomitant medication section - patients with any sensitivity or allergy to any of the products used within this clinical trial. - presence of any other condition or illness, which, in the opinion of the investigator, would interfere with optimal participation in the study.

- women currently pregnant or breast-feeding. - patients presenting acute impairment of renal function or nephrolithiasis. - patients presenting hypercalcaemia and/or hypercalciuria - patients presenting pseudohypoparathyroidism - use of any vitamin d supplementation alone or in association at screening visit; - use of any prohibited medication as detailed in the concomitant medication section - patients with any sensitivity or allergy to any of the products used within this clinical trial. - presence of any other condition or illness, which, in the opinion of the investigator, would interfere with optimal participation in the study.