A gluten-free diet may have a downside: increased blood levels of arsenic and mercury, according to a preliminary report.
Researchers analyzed data on 7,471 participants in a larger national health study, of whom 73 reported being on a gluten-free diet. Concentrations of urinary arsenic in those on the diet were nearly twice as high as in those not on it.
One possible culprit? Rice, which can absorb metals from water and soil.
Source: NY Times