Associations of blood and urinary mercury with hypertension in U.S. Adults: The NHANES 2003-2006

► We examined the association between mercury and hypertension in US adults. ► Two main biomarkers of mercury exposure, methyl (blood) and inorganic (urine), were examined. ► Blood mercury was not associated with the risk of hypertension. ► There was a suggestive inverse or U-shaped association with urinary mercury. ► No significant effect modification by omega-3 fatty acids or selenium was found.