What Is a Low Ferritin Blood Level for Teenage Girls?

By Staff WriterLast Updated March 29, 2020

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.

A normal ferritin level varies between different testing labs, according to WebMD. Any lab report confirms the range it is using. A doctor also assesses the results of this test against other measures of health to check if there is a problem. If a low ferritin level is present, it indicates potential iron deficiency, which has a number of causes.