Every vitamin and mineral comes with a recommended daily allowance. That we know from staring at the side panel of every box of cereal we've ever eaten. But how well do we know how much we should be taking? Of course, a precise number, as established by the FDA and other related institutes, depends a lot on age and sex. So let's use broad strokes and test your knowledge of general ranges. The following ranges are based on an average for adult men and women ages 18-70. Can you pick out the correct range from the phony one? N.B. there is 1,000 mg in a gram, and 1,000 mcgs (or μg) in a mg.