What Is a Normal Iron Level?

Overview

A physician might order a serum iron test to detect levels of iron in the bloodstream. This test is commonly performed for people who show symptoms of iron-deficiency anemia.

Measurement Unit

Serum iron levels are measured in micrograms per deciliter (commonly abbreviated to mcg/dl).

Normal Range

In an adult, a normal blood iron level is 60 to 170 mcg/dl. On average, women have slightly lower iron levels.

Influencing Factors

Iron levels tend to be highest in the morning and lowest in the evening. If a practitioner suspects iron deficiency, she will usually recommend testing before noon.

Effect of Medication

Many medications can affect serum iron levels. Drugs containing estrogen, including birth control pills, can raise iron levels, while some antibiotics can reduce them.

High Iron Levels

Unusually high iron levels might be caused by a number of conditions, many of which are serious. They include iron poisoning, hepatitis, hepatic necrosis, hemochromatosis, and deficiencies of vitamin B-6 and B-12.

Low Iron Levels

Below-average iron levels are usually less serious and more treatable than high iron levels. Common causes include heavy menstruation, poor absorption of iron, poor diet and chronic gastrointestinal bleeding.