By Janet Raloff
Subtle bone loss associated with advanced gum disease can be linked to elevated lead concentrations in the blood, a new study finds.
A toxic metal, lead is best known in the public-health sector for causing nerve damage in children. However, it can also pose significant risks to adults by, for example, elevating blood pressure. Fortunately, the body stores most of the lead in newly forming bone, where it remains until that bone breaks down from disuse or disease.