High-risk children in the US should have routine vitamin D level checks by paediatricians after a study found seven out of ten have low levels, increasing their risk of bone and heart disease.

Albert Einstein College of Medicine of Yeshiva University researchers analysed data of more than 6,000 children and found that 70% were either had deficient or insufficient levels.

Researchers found that low levels of vitamin D were related to poor bone health, higher systolic blood pressure and lower calcium levels.

A proper diet, supplements, exposure to sunlight and regular screening of high-risk children for vitamin D deficiency are recommended by the researchers.