We are interested in studying in more detail how iron levels are regulated by hormones and other pathways. Request an Appointment at Mayo Clinic. Picawhich are unusual cravings for nonfood items, such as ice, dirt, paint, or starch. Pregnant women and people Iron levels ibn adults certain conditions sometimes need extra iron. Foods such as meat, eggs, and some green leafy vegetables are high in iron. Blood tests allow your doctor to look at the amount of other nutrients in your blood, such Iron levels ibn adults vitamin B12 or folic acid.