There is a public health concern in the UK - rickets has returned. Researchers on both sides of the pond are finding that children are playing on computers instead of outdoors, limiting their ability to get sufficient vitamin D, in combination with poor dietary habits.
Rickets is a disease that has been practically non-existent in developed countries since the early-1900s. US agency Centers for Disease Control defines nutritional rickets as "a condition that causes weak or deformed bones in young people."
According to Simon HS Pearce, professor of endocrinology, and lead researcher in the study Diagnosis and management of vitamin D deficiency, vitamin D is essential, as its deficiency has been associated with cardiovascular disease, type 2 diabetes, several cancers, and autoimmune conditions for both children and adults.