The Right Dose of D

Despite all the much-heralded benefits of vitamin D—including protection against hypertension, hardening of the arteries and diabetes—increasing your intake to levels higher than what health
professionals recommend offers no advantages and may be harmful.

Those are among the findings of new research from Johns Hopkins University School of Medicine, published online in The American Journal of Medicine. People who have normal blood levels of vitamin D are at lower risk for stiffening of the blood vessels and cardiovascular problems than those who have high blood levels of the vitamin, according to Johns Hopkins researchers.