Trace minerals in the body, although small in quantity, play large roles in its functioning. Trace minerals have been hard to study because of what factor?
A) Food composition data are not necessary for all trace minerals.
B) Bioavailability varies within the context of the total diet.
C) The comparability of trace mineral content of foods is high.
D) Reliable and valid indicators of trace element status are readily available.
B
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Various factors complicate the study of trace minerals. They include high variability of trace mineral content, food composition data are not available for all trace minerals, bioavailability varies within the context of the total diet, and reliable and valid indicators of trace elements status are not available.
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