RT Journal Article SR Electronic T1 Vitamin D and child health: part 2 (extraskeletal and other aspects) JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 368 OP 372 DO 10.1136/archdischild-2012-302585 VO 98 IS 5 A1 Nick J Shaw A1 M Zulf Mughal YR 2013 UL http://adc.bmj.com/content/98/5/368.abstract AB The first part of this review focused on the skeletal aspects of vitamin D. This second part reviews some of the available evidence that vitamin D may have a physiological extraskeletal role beyond its traditional effect on the skeleton. This aspect has influenced the definition of vitamin D deficiency and what level of vitamin D should be regarded as optimal. The recognition of the prevalence of vitamin D deficiency and insufficiency has led to debate as to whether and how we should be treating asymptomatic individuals. This review discusses the potential extraskeletal effects of vitamin D, the definition of vitamin D deficiency and our thoughts on indications for measurement and treatment.