Abstract
There have been several studies evaluating the association between vitamin and mineral status and menstrual disturbance. In the present study, we aimed to assess the relationship between the menstrual bleeding pattern and premenstrual syndrome (PMS) symptoms with serum 25-hydroxyvitamin D, and calcium levels in adolescent girls. A cross-sectional study was carried out in 897 high school girls from northeastern Iran. The prevalence of hypocalcaemia, normal serum calcium and hypercalcaemia was 27.1, 59.8 and 13.1%, respectively. The menstrual flow of participants differed significantly between the calcium status groups (p = .005). There was no significant association between the symptoms of PMS, as assessed by the questionnaire and serum vitamin D status, or serum calcium concentrations, apart from the irritability. There appears to be an association between serum calcium, menstrual blood loss and irritability in adolescent girls.Impact statementWhat is already known on this subject? Several studies have evaluated the association of vitamin and mineral status with menstrual disturbance, although these relationships are not consistent, specifically among calcium and vitamin D levels with a menstrual bleeding pattern.What do the results of this study add? In the present study, we investigated the correlation of menstrual bleeding patterns and PMS with calcium and vitamin D levels in a large population in adolescent girls. We found that the level of calcium was associated with the level of menstrual blood loss and irritability. However, no significant association was observed between the menstrual bleeding pattern or the PMS symptoms with a vitamin D status.What are the implications of these findings for future clinical practise/research? Further studies are required to assess the value of a calcium adequate intake or a calcium supplementation for the amelioration of PMS and a better understanding the role of calcium in PMS.
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