Myths vs facts: Transferrin and stress

Transferrin is an iron-transport protein whose levels are influenced by iron status, inflammation, and liver function. A common myth is that psychological stress directly alters transferrin levels. In reality, there is no strong evidence that everyday stress alone significantly changes transferrin concentration. Acute stress can affect iron regulation via cortisol and cytokines, but the effects are small and indirect. Chronic stress with inflammation may increase hepcidin, reducing iron availability and potentially lowering transferrin saturation. However, transferrin is not a validated stress biomarker. Clinically, it is used to assess iron deficiency or overload, not stress. Fact: Transferrin reflects iron metabolism and inflammation, not psychological stress. Measurements should be taken fasting and without acute infection for accurate interpretation.