NSD 225 Lecture Notes - Lecture 14: Iron Overload, Diarrhea, Breastfeeding

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The trace minerals: needed in much smaller amounts, essential for health, difficult to study, only trace amounts in the body, animal sources of mineral are generally better absorbed. Iron: found in every cell, 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, infants and young children, teenagers. 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: determined by body"s need, absorbed in an acidic environment, hindered by phytic acid, oxalic acid, high fiber, high calcium, polyphenols.

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