New study shows vitamin D-related 'molecular switches' predict childhood bone mass

Researchers at the MRC Lifecourse Epidemiology Unit, University of Southampton, have demonstrated that the degree to which a gene related to vitamin D action is switched on or off, when measured at birth, predicts bone density of the child at four years of age.

http://medicalxpress.com/news/2013-08-vitamin-d-related-molecular-childhood-bone.html