Scientists believe they may have found the reason why some people get so sick from the contrast dye injected into the bodies of people before they get magnetic resonance imaging (MRI) scans. As a University of New Mexico (UNM) press release explains, researchers at the institution's medical school believe they've found a link between oxalic acid — a molecule found in foods as disparate as sweet potatoes and spinach to chocolate and almonds, as well as some Vitamin C supplements — and the toxic building of gadolinium, the heavy metal element used in contrast dyes that works with an MRI's […]