Low calcium intake and hypovitaminosis D in adolescent girls.

摘要

We recently reported that 73% of adolescent girls attending an inner city school in Manchester, UK had hypovitaminosis D (serum 25-hydroxyvitamin D concentration <30nmol/l). However, none of the subjects had clinical features of vitamin D deficiency or disturbance of their serum calcium or inorganic phosphate concentrations. Rajeswari et aP have suggested that low dietary calcium intake, which is common in many parts of India, exacerbates symptoms of vitamin D deficiency.We studied 50 posi-menarchal girls from a state-run school in Pune, Tndia during February 2006, using a similar protocol to that used previously. Informed consent was obtained from parents and the study was approved by the Ethical Committee of the Hirabai Cowasji Jehangir Medical Research Institute. None of the subjects were receiving vitamin D or any other dietary supplements. A 7 day food frequency questionnaire and Gopalan et al's tables of the nutrient value of Indian foods were used to estimate daily dietary intake of calcium and vitamin D.