Blood test

Normal iron level in the blood

Blood test
Normal iron level in the blood

What is the normal iron level in the blood?

Men 70 - 180 µg/dL
Women 60 - 180 µg/dL
Children 50 - 120 µg/dL
Baby: 40 - 100 µg/dL
Newborn: 100 - 250 µg/dL

In the International System of Units (SI), iron in the blood is measured in µmol/L. The normal iron level in the blood in the SI is:

Men: 12.5 - 32.2 µmol/L
Women: 10.7 - 32.2 µmol/L
Children: 8.95 - 21.48 µmol/L
Baby: 7.16 - 17.9 µmol/L
Newborn: 17.9 - 44.8 µmol/L

Why normal levels can differ across different labs?

Each laboratory must establish its own normal ranges for iron in the blood. These ranges depend on the makeup of the local population, the technologies used and the accuracy of the measurement. There may be also slight differences in the normal levels according to age, gender, race or ethnic origin, geographic region, diet, type of sample and other relevant status.

Your doctor will study the results along with your medical record, screenings, physical condition, symptoms and any other relevant information about your situation.

In women and children, normal ranges of iron in the blood are a bit lower than in men.

The Iron blood level varies throughout the day. Morning level is usually higher than afternoon level. The iron blood test is usually made in the morning.

What is the role of iron in the body?

Iron is found in the body in three ways:

  • As hemoglobin in the red cells of the blood to transport oxygen to the tissues (65-70% of the total amount)
  • Stored as ferritin and hemosiderin in the liver, spleen and bone marrow. (30% of the total amount)
  • Bound to myoglobin (3-5%), a protein used by the muscle cells.

There is also a small amount of free iron present in the blood that is not bound to other proteins.

What is the iron blood test used for?

The serum iron level (not of the heme group) is used to diagnose and monitor iron deficiency anemia, chronic nephropathy and hemochromatosis. Hemochromatosis is a disease where two iron pigments, hemosiderin and hemofucsina, are deposited in the tissues and produces skin pigmentation.

Iron blood test measures free serum iron. This test is performed along with ferritin, transferrin or TIBC (Total Iron-Binding capacity) and hemoglobin tests.

If iron in the blood is low, it can affect to the hemoglobin formation. Hemoglobin is essential to carry oxygen to the cells. Low iron levels may cause fatigue, muscle weakness or tiredness.

If iron in the blood is high, it may be deposited in different organs (brain, liver, heart and pancreas) causing diseases because iron can be toxic to these organs.

Where can I find more information about iron level in the blood?

You can visit our pages about:

Which values are considered a normal iron level in the blood?

The following values are considered to be normal values:

IMPORTANT: These levels are expressed in µg/dL. They are an example of a healthy woman of about 45 years old with no known disease and not taking any medication. The ranges can be different depending on the laboratory or on your personal circumstances.

60 µg/dL61 µg/dL62 µg/dL63 µg/dL64 µg/dL65 µg/dL66 µg/dL67 µg/dL
68 µg/dL69 µg/dL70 µg/dL71 µg/dL72 µg/dL73 µg/dL74 µg/dL75 µg/dL
76 µg/dL77 µg/dL78 µg/dL79 µg/dL80 µg/dL81 µg/dL82 µg/dL83 µg/dL
84 µg/dL85 µg/dL86 µg/dL87 µg/dL88 µg/dL89 µg/dL90 µg/dL91 µg/dL
92 µg/dL93 µg/dL94 µg/dL95 µg/dL96 µg/dL97 µg/dL98 µg/dL99 µg/dL
100 µg/dL101 µg/dL102 µg/dL103 µg/dL104 µg/dL105 µg/dL106 µg/dL107 µg/dL
108 µg/dL109 µg/dL110 µg/dL111 µg/dL112 µg/dL113 µg/dL114 µg/dL115 µg/dL
116 µg/dL117 µg/dL118 µg/dL119 µg/dL120 µg/dL121 µg/dL122 µg/dL123 µg/dL
124 µg/dL125 µg/dL126 µg/dL127 µg/dL128 µg/dL129 µg/dL130 µg/dL131 µg/dL
132 µg/dL133 µg/dL134 µg/dL135 µg/dL136 µg/dL137 µg/dL138 µg/dL139 µg/dL
140 µg/dL141 µg/dL142 µg/dL143 µg/dL144 µg/dL145 µg/dL146 µg/dL147 µg/dL
148 µg/dL149 µg/dL150 µg/dL151 µg/dL152 µg/dL153 µg/dL154 µg/dL155 µg/dL
156 µg/dL157 µg/dL158 µg/dL159 µg/dL160 µg/dL161 µg/dL162 µg/dL163 µg/dL
164 µg/dL165 µg/dL166 µg/dL167 µg/dL168 µg/dL169 µg/dL170 µg/dL171 µg/dL
172 µg/dL173 µg/dL174 µg/dL175 µg/dL176 µg/dL177 µg/dL178 µg/dL179 µg/dL
180 µg/dL       
foto de Dr. Javier Muga Bustamante
Written by

Dr. Javier Muga Bustamante

Last update: 08/04/2020


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