What causes vitamin d deficency in children?

Vit D deficiency: Limited exposure to the sun, obesity, malabsorption, age.

Varying factors: Vit d normally made with sun exposure to skin (trade off of sun damage v vit d ) , but can be added to foods such as milk. More rarely, absorption in gut and metabolism can be affected parathyroid system changes.

Lack of sun exposure: Lack of adequate sun exposure also leads to vitamin d deficiency in adults, too. However, sun exposure + sun block won't work. You need sun exposure w/o sun block, which then increases risk for skin cancer. Not to mention, it's pretty hot in uae to go outside. Better/safer to take vitamin d supplement. Of course, should also monitor 25oh vitamin d levels, too. Check out http://goo.Gl/votkd.