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15 Cards in this Set
- Front
- Back
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What factors impact iron digestion and absorption?
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Individuals iron status, level on consumption, amount of stomach acid
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Compare heme and non-heme iron?
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Heme: more absorbable, ferrous iron released from hemoglobin
Non-heme: less absorbale, in plant and animal food, required adequate stomach acidity |
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Which type is in animal, which in plants?
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Heme in animal and non-heme in both
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What factors promote and what factors impair absorption of non-heme iron?
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Promoting factors: vit C reduces and binds with ferrous form, meat factor eating heme sources with non-heme, adequate acid, other acids
Impair factor: phytates polyphenols, soy protein, Ca or Zn supplements |
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What is mucosal block and proteins involved in iron storage and transport.
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Mucosal ferritin stores iron in mucosal cells, and acts as a barrier to excess absorption (mucosal block, When iron is needed, ferroportin releases iron which is oxidized to ferric iron by cerulplasmin (Fe2+ Fe3+); and bound to transferrin for transport in the blood.
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Too much iron over time can promote chronic disease due to what process?
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Elevated ferrin levels and altered iron storage
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What are the signs (ferritin, transferrin, hematocrit) and symptoms associated with the stages of iron depletion?
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apathy , fatigue, concentration problems, impaired immunity, concave nails, palm creases, inability to regulate body temp; decline in work capacity, mistaken for behavioral or motivational problems.
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What is the function of zinc in blood health?
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Coenzyme for hemoglobin production
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How are copper and vitamin K involved in blood health?
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Copper is required for iron transport and vit K is synthesis of blood coagulation proteins
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What are their sources?
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Vit K: green leafy cabage type vegs …copper: seafood, ogdan meats, nuts, seeds, whole grains
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What is the common function of folate and vit B12 that impacts blood health?
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DNA synthesis
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Food sources of both?
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Folate: enriched breads, flours, pasta, grain products …vit B12: animal sources
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If you’re deficient in folate, what three conditions can occur?
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Cardiovascular and cerebrovascular disease and neural tube
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What does vit B12 require to be absorbed?
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Acidic environment and intrinsic factor
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What causes pernicious anemia, and who’s at risk?
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B12 deficiency, vegetarians
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