Vitamin D biology homework help

1. Why is it important?

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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