Question: how much iron should a teenage girl have per day?
Answer: Teenage girls who have begun to have menstrual periods can help prevent iron-deficiency anemia by taking a multivitamin with iron. The Recommended Dietary Allowance (RDA) for iron is eight milligrams (mg) per day for females ages 9 to 13 years, and 15 mg per day for females ages 14 to 18 years.