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Ferritin levels are the amount of ferritin in the blood related to the amount of iron stored in the body, according to MedlinePlus. Ferritin levels are measured to identify likely causes of anemia, detect inflammation, or to determine whether there is excess iron in the body.


According to the Mayo Clinic, lower than normal ferritin levels are indicative that someone has an iron deficiency. Ferritin is a blood cell protein that contains iron.


Iron deficiency, either through lack of iron in the diet or absorption issues, causes low ferritin, B-12 and iron levels, according to Mayo Clinic. Other vitamins, such as B-12, C, folate and zinc, assist in more efficient iron absorption, according to the Iron Disorders Institute.


A ferritin blood test measures the level of ferritine in the body, explains MedicineNet. As ferritin is the major iron storage protein in the body, ferritin blood tests can indirectly measure iron levels. No special preparation is required before the blood test.


For men, the normal range for ferritin is 24 to 336 nanograms per milliliter, and for women, the normal range for ferritin is 11 to 307 nanograms per milliliter, explains Mayo Clinic. These are measured in standard units.


A blood level of 12 to 150 nanograms per milliliter of blood is a normal reading for a ferritin test in women, while 12 to 300 nanograms per milliliter in males is normal, notes MedicineNet. Normal ranges vary between laboratories. A ferritin blood test evaluates the body’s stores of iron.


Normal ferritin levels increase as children grow older, but for teenagers and young girls, the normal range is 7 to 140 nanograms per milliliter, according to WebMD. For adult women, the range is 18 to 160 nanograms per milliliter. Values below these ranges are considered low ferritin levels.


High ferritin levels are not caused by nutritional yeast, but may be caused by a buildup of iron in the body, explains WebMD. Ferritin is a protein that binds to iron, and the amount in the blood is the same as is found in the body.


A ferritin serum test is a blood test that measures the amount of ferritin in the blood, states Mayo Clinic. Ferritin is a protein that binds to iron, according to Healthline.


A ferritin level of 189 nanograms per milliliter is normal for a man, but it is considered high for a woman, according to MedlinePlus. In women, a normal ferritin level ranges from 12 to 150 nanograms per deciliter but ranges from 12 to 300 nanograms per deciliter in men.