Iron is commonly associated with great strength. (Think of spinach-eating Popeye.) Take our quiz to find out how much you know about this mineral’s role in the body.

1. True or False? One of the first symptoms of low iron is weakness, fatigue, or loss of stamina.

2. True or False? There is only one form of dietary iron.

3. True or False? Vitamin C improves iron absorption.

4. True or False? Everyone should take iron supplements.