When do you consider iron deficiency?
Unlike other minerals that have a consistent level despite the difference in sex and age, normal iron levels differ according to age and sex. Ferritin is the iron form that can be measured in the blood. Ferritin is measured by nanogram per millimeter (ng/ml).
Normal ferritin levels:
- Newborn: 25–200 ng/ml
- 1-month infants: 200–600 ng/ml
- Infants from 2 to 5 months: 50–200 ng/ml
- Children from 6 months to 15 years: 7–140 ng/ml
- Male Adults: 20–250 ng/ml
- Female adults: 10–120 ng/ml
Doctors won’t usually ask for ferritin level tests, but hemoglobin level instead because 70% of iron is in hemoglobin. Hemoglobin is measured by grams per deciliter (g/dl).
Normal hemoglobin levels:
- Males: 13.5-17.5 g/dl
- Females: 12.0–15.5 g/dl