Answer & Explanation:1. Why is it
2. From what
sources can it be obtained?
3.  What happens if you are deficient in this
substance? Explain.
4.  Is toxicity associated with it if too much is
ingested?  If so, what are the
symptoms?  If not, explain.
5. What is
the recommended dose (RDA)? (Use a well-known over the counter source such as
Centrum, One a Day etc. and make sure you credit your source.)

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