Parents are being urged to give new babies Vitamin D supplements to prevent the bone disorder rickets.
New parents should give their children a daily supplement of Vitamin D from birth to a year old.
Rickets causes a softening of bones, which can lead to deformities and fractures and a classic bow-legged appearance. It is a significant health problem in developing countries.
Vitamin D can be produced through the action of sunlight on the skin but lack of sunshine in winter can inhibit this, according to the Food Safety Authority of Ireland.