Nearly one-third of Americans have some iron deficiency KHON2Iron deficiency may affect nearly 1 in 3 Americans, new study finds NBC NewsIron deficiency could be impacting almost a third of American adults, Boston hospital’s study says CBS BostonDo You Have an Iron Deficiency? 7 Symptoms to Watch Out For CNETNearly 1 in 3 US adults may have an iron deficiency, study suggests WPTZ