What's all about vitamin D Every five or 10 years, a new vitamin becomes the vitamin of the moment. The hot one right now is probably vitamin D, and so far all of the evidence looks encouraging. Why vitamin D deficiency? Step out in the sun and get it's free medicine this book contains useful information about vitamin D and 2 studies: 1.Vitamin D deficiency in sunny Kuwait, is it prevalent in sunny countries, why? 2. Vitamin D deficiency in adolescent idiopathic scoliosis the question Is AIS related to vitamin D deficiency? and whether treatment with vitamin D can prevent progression of scoliosis and concomitantly surgery