5 11 11 - The Trace Minerals Needed in much smaller amounts...

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The Trace Minerals Needed in much smaller amounts Are essential Difficult to study due to the trace amounts needed by the body Food content dependent on soil content Animal sources of mineral are generally better absorbed.
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Iron – “The body’s gold” Found in every cell 15-18 % is absorbed Heme iron Vs. Nonheme iron Heme found in animal products are better absorbed than nonheme Vitamin C enhance absorption
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Absorption of Iron Determined by body’s need Acidic environment Upper small intestine is absorption site Hindered by phytic acid, oxalic acid, high fiber, high calcium, polyphenols
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Iron Absorption 1. Form of iron heme iron vs. non-heme iron 2. Presence of vitamin C can triple non-heme iron absorption 3. Meat/Fish/Poultry (MFP) Factor enhance iron absorption 4. Presence of inhibitors - phytates – spinach (2-5% iron absorbed)
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Iron absorption is regulated by 3 mechanisms 1. Diet – increase dietary iron = decrease absorption 2. Storage – low storage = increase absorption 3. Red blood cells – anemic = increase absorption
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Hemoglobin makes up 95 % of red blood cells
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Functions of Iron Hemoglobin in red blood cells Transports oxygen and carbon dioxide High turnover, high demand for iron Myoglobin in muscle cells Electron transport chain Enzyme cofactor Immune function Drug-detoxification pathway
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Iron-Deficient Anemia Most common form of anemia
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This note was uploaded on 06/23/2011 for the course NUTRITION 210 taught by Professor Dr.bomser during the Spring '11 term at Ohio State.

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5 11 11 - The Trace Minerals Needed in much smaller amounts...

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