Which question is best answered by using the Dietary Reference Intakes (DRI)?
A) How much of a vitamin is too much?
B) Is the amount in this vitamin supplement safe?
C) Is the amount in this vitamin supplement effective?
D) How much of a certain vitamin is needed each day?
Question 2
Beta-carotene is a form of ____.
A) folic acid
B) vitamin A
C) vitamin C
D) vitamin E