Genetic mapping reveals Celtic “iron overload” hotspots—prompting calls for life-saving community screening. Credit: AI/ScienceDaily.com People with roots in the Outer Hebrides and north west Ireland face the highest known risk of developing hemochromatosis, a genetic disorder that causes the body to absorb and store too much iron. Over time, that excess iron can build up to dangerous levels. This is the first time researchers have mapped genetic risk for hemochromatosis, sometimes called the '