What is the minimum transferrin saturation percentage indicating adequate iron levels?

Transferrin saturation is a key indicator used to assess iron levels in the body. It measures the percentage of transferrin, a protein that transports iron, that is saturated with iron. Adequate iron levels are essential for various bodily functions, including oxygen transport in the blood and energy production.

The minimum transferrin saturation percentage indicating adequate iron levels is generally considered to be around 20%. When transferrin saturation is at this level or higher, it suggests that there is sufficient iron available for the body's requirements, reducing the risk for iron deficiency anemia and ensuring proper physiological function.

Lower levels, such as those in the range of 10%, 15%, or even lower than 20%, might indicate inadequate iron stores, which could lead to decreased hemoglobin levels and symptoms associated with iron deficiency. Therefore, a transferrin saturation of 20% serves as a baseline that healthcare providers often reference to evaluate a patient's iron status effectively.