The College Board—the maker of the SAT—is amassing an army of lobbyists across the country for one purpose: not to improve student outcomes, increase college access, or even promote its own test.

Photos / Getty Images Iron deficiency is one of the most common nutritional deficiencies in the world, with women, children, and people with low dietary iron levels the most likely to experience it.

These findings provide a deeper understanding of how iron levels and redox balance within the body influence its magnetic properties, potentially offering a new way to track disease progression.