This question is about Nutrition
Iron saturation measures the amount of iron that is present in the blood. Therefore, low iron saturation means that there is a low amount of iron in the blood, which may indicate an iron deficiency.
There are a few ways to measure normal iron saturation levels.
Total iron-binding capacity (TIBC). TIBC is a test that can indicate iron saturation levels. The normal range for TIBC is 250–450 mcg/dl, so a value higher than this range may indicate iron deficiency or low iron saturation [ 1
Transferrin. Transferrin saturation is calculated as the ratio of iron to transferrin or iron to total iron-binding capacity, and may indicate iron saturation levels in the blood [ 2 3
Serum iron test. This test measures the level of iron in the blood. The normal range for serum iron is 70–175 mcg/dl for males and 50–170 mcg/dl for females [ 4
Transferrin. University of Rochester Medical Center. (n.d.). https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=167&contentid=transferrin
Pfeiffer, C. M., & Looker, A. C. (2017). Laboratory methodologies for indicators of iron status: strengths, limitations, and analytical challenges. The American journal of clinical nutrition, 106(Suppl 6), 1606S–1614S. https://doi.org/10.3945/ajcn.117.155887
Ogun, A. S. (2022, November 16). Biochemistry, transferrin. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK532928/
Iron and total iron-binding capacity. University of Rochester Medical Center. (n.d.). https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=167&contentid=iron_total_iron_binding_capacity