Warning over childhood vitamin use

GPs are being warned about vitamin D use in asthmatic children after the supplement was linked to worsening lung function.

In a randomised controlled trial involving 44 children with asthma, respiratory specialists found vitamin D supplements failed to have any benefit on asthma.

It was also associated with deterioration in lung function compared with placebo.

In the 15-week Irish trial, children aged 6-16 were given either vitamin D3 (2000 IU a day) capsules or placebo during the winter months.

The children mostly had atopic asthma and about half