Experts review vitamin D advice

The chief medical officer for England, Dame Sally Davies, is to contact medical staff about concerns young children and some adults are not getting enough vitamin D.
Government guidelines recommend some groups, including the under-fives, should take a daily supplement. However, recent research found that many parents and health professionals were unaware of the advice.
There has been an increase in childhood rickets over the past 15 years.
According to Dr Benjamin Jacobs, from the Royal National Orthopaedic Hospital, links to heart disease and some cancers are also being investigated.The consultant paediatrician told BBC Breakfast that the hospital saw about one severe case a month of rickets - softening of bones through lack of vitamin D in childhood.

Source  - BBC