The nutritional transition influences the hypovitaminosis D which causes hypocalcaemia and increases the risk of osteoporosis on Moroccan women.

Determine the prevalence of hypovitaminosis D among Meknassies women during 2013–2015.

The vitamin D contributes to maintain the phosphocalcique homeostasis. The deficiency of vitamin D causes bone loss and few studies have been held to this subject in Morocco.

Epidemiological investigation made with 1320 Meknassies women, who had blood analysis for vitamin D and calcium prescribed by attending physician in two laboratories of the medical analysis from January 2013 until December 2015. The blood analysis has made by Total Elecsys. Statistical analyses were run by SPSS13.0 software. The quantitative variables were age and 25 hydroxyvitamin D and calcium; the qualitative ones were the season and specialty of physician.

Average age=55,24±13.98 years old, calcium=91.34±8,.1mg/L, the rate of the median 25 hydroxyvitamin D=12ng/mL; 52.8% of the prescribers were general practitioners and rheumatologists; 73.1% of proportions mostly taken during summer (29.7%) and spring (28.3%). The prevalence of hypovitaminosis vitamin D was 85.4% associated with 37.3% of hypocalcaemia and cold seasons (winter 52.6%, autumn 26%). The linear logistic regression has been shown the variation of vitamin D was dependent to the age (2,084; 95% CI [0.006; 0.210]).

Hypovitaminosis D is public health problem, which increases the hypocalcaemia and osseous brittleness.