vitamin d deficiency among middle-aged women in karaj, iran

Background: vitamin d is a fat-soluble vitamin that is an essential nutrient in the body. it is present in both d2 and d3. vitamin d deficiency as a major public health problem is known over the world. methods and materials: this study was conducted to determine the prevalence of 25-hydroxyvitamin d deficiency in 240 middle-aged women (40-60 years old) in late april 2017 in karaj. sampling was done randomly from blood tests were performed among the patients.results: the results showed that the prevalence of vitamin d deficiency was 95-90%, and the incidence was more pronounced between the ages of 30 and 30 years. the mean serum level of vitamin d showed a positive significant difference in different decades of age (p < 0.0001). the relationship between mean serum level with the type of house was not significant (p = 0.142), but there was negative and significant (p < 0.001) relationship with the house direction. the relationship of mean serum level with the number of pregnancies and the number of children was not significant (p = 0.159). the correlation of the mean serum level of vitamin d with body mass index (bmi) was not significant (p = 0.567).conclusion: vitamin d deficiency was prevalent in studied population, especially among youth comparing to elderly participants. due to this research, enrichment and fortified dairy and some food with vitamin d is recommended.