NFS 4271 Study Guide - Quiz Guide: Genetic Disorder, Mean Corpuscular Volume, Antigen
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17 Sep 2017
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Trace Minerals
Explain the difference between trace and ultratrace minerals
Typically defined as minerals needed in amounts of <100 mg/day
Ultratrace if <1mg/day required
RDAs established for Fe, Zn, Cu, Se, I, & Mo
AIs for Cr & Mn
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Iron
● Sources
○ Heme iron: meat, fish, poultry
○ Nonheme iron: nuts, fruits, vegetables, grains, tofu, dairy
○ Grain foods fortified with iron
○ Oral supplements of ferrous iron
○ Heme iron, a metalloporphyrin.
● Porphyrin
○ A class of pigments (including heme and chlorophyll) whose molecules contain a
flat ring of four linked heterocyclic groups, sometimes with a central metal atom—
mg or fe
○
● RDA
○ Men: 8 mg/day
○ Women (19-50 years): 18 mg/day
○ Women (51+ years): 8 mg/day
● Upper level for adults: 45 mg/day
○ Up to 120 mg/day for iron deficiency treatment
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● What we eat in America
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