Something as simple as a mother’s vitamin D level can have a future impact on her children, a study from Johns Hopkins Bloomberg School of Public Health shows. Researchers examined 20 years of health data from 754 Boston-area mothers and their children and found that preeclampsia—abnormally high blood pressure during pregnancy—was linked to a higher systolic blood pressure in the children during their early and teen years. However, the effect was minimized or even eliminated among children exposed to higher levels of vitamin D in the womb, as measured by blood levels in the umbilical cord.