Question: how much iron should a teenage girl take?
Answer: Kids ages 4–8 years need 10 milligrams while older kids ages 9–13 years need 8 milligrams. Teen boys should get 11 milligrams of iron a day and teen girls should get 15 milligrams. (Adolescence is a time of rapid growth and teen girls need additional iron to replace what they lose monthly when they begin menstruating.)