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20 March, 13:01

Older adults need more vitamin d than younger adults because they

a. are less efficient at making their own.

b. excrete large amounts in their urine.

c. do not eat enough fat to absorb the vitamin efficiently.

d. are in a state of positive calcium balance.

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  1. 20 March, 13:31
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    A. Are less efficient at making their own
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