How Much Do You Know About Vitamins?

Sometimes it's hard to keep your vitamin facts straight. How much vitamin A do you need? What's the best source of Vitamin C? And all those B vitamins—which one is which? Here's a quiz that offers a chance to learn something different, but not necessarily trivial, about vitamins.

1. If you live above the 45th parallel, you are likely to be deficient in which vitamin?
2. At one time, the disease rickets had all but disappeared from the United States. Now, rickets is making a reappearance. Which infants are most likely to develop rickets?
3. Eating the liver of which animal can cause acute vitamin A toxicity?
4. Which vitamin can cause birth defects if too little is in the diet?
5. Which is the leading cause of blindness in children worldwide?
6. British sailors were called "limeys" because:
7. The highest concentration of vitamin C is found in which food?
8. In the United States, the person most likely to develop scurvy (vitamin C deficiency) is: