A 7years old female girl LKV was brought by her father to consult his family physician regarding his daughter leg problem. Slight bending of the lower limbs was observed from past 4 months, none of bone deformities. Her body weight is 24.3 kg and height 116.8 cm. After a complete physical examination, the physician was advised biochemical tests such as serum T3, T4 and TSH. TSH levels are within normal range, and serum 25 hydroxy Vitamin D levels found to be very low. X-ray report reveals that mild deformities are observed. Background: Literatures on the vitamin D status of the population in a tropical country like India have seldom been documented. Vitamin D deficiency is presumed to be rare. There is a need to assess dietary habits, serum calcium, 25(OH) vitamin D [25(OH) D], and parathyroid hormone levels of urban and rural population in a State in South India. Humans can fulfill their vitamin D requirements by either ingesting vitamin D or being exposed to the sun for enough time to produce adequate amounts. Vitamin D controls calcium absorption in the small intestine and works with the parathyroid hormone to mediate skeletal mineralization and maintain calcium homeostasis in the blood stream.
