NSD 225 Lecture Notes - Lecture 14: Iron-Deficiency Anemia, Heme, Iron Overload

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Animal sources of mineral are generally better absorbed. The most common nutrient deficiency in the world: microcytic, hypochromic anemia (small and dull in color) Main functions: hemoglobin in red blood cells transports oxygen and carbon dioxide, myoglobin in muscle cells. High risk for iron deficiency anemia: women in their reproductive years, pregnant women. Iron sources: red meats, fish, poultry, shellfish, legumes, spinach. Iron: heme vs. nonheme sources: heme found in animal products and better absorbed/available, non-heme found in plant sources and less well absorbed/available. Factors enhance non-heme iron absorption: meat protein factor, vitamin c. Absorption of iron: deter(cid:373)i(cid:374)ed (cid:271)y (cid:271)ody"s (cid:374)eed, absorbed in an acidic environment, hindered by phytic acid, oxalic acid, high fiber, high calcium, polyphenols. Iron needs: rda is 8 mg/day for adult male, rda is 18 mg/day for female age 19 to 50, average intake exceeds rda for men; low for some women. Iron toxicity: serious, especially for children, signs:

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