The 2010 Dietary Guidelines identified several "nutrients of concern" that are known to be somewhat lacking in the American diet. They are:

a. iron, calcium, phosphorus, and zinc.
b. iron, calcium, vitamin D, and vitamin A.
c. potassium, dietary fiber, calcium, and vitamin D.
d. potassium, dietary fiber, phosphorus, and vitamin D.


c

Nutritional Science

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