nutr chapter 15

• heme iron is found in animal flesh
• nonheme iron is found in vegetables, grains, and supplements
• ferritin binds and stores iron to prevent it from entering bloodstream
• transferrin receptors on cells bind transferrin and engulf into cell by endocytosis
• iron deficiency is the most wide spread deficiency in the us
• in adults iron overload is likely due to a genetic condition called hemochromatosis
• copper functions as an important component of many enzymes
• iodine bioavailability is decreased by goitrogens