Is Transferrin useful for Darmgesundheit?

Transferrin is a transport protein for iron and is primarily used to assess iron status. Altered iron metabolism can impact gut health: iron deficiency may promote intestinal inflammation and dysbiosis, while iron overload (e.g., in hemochromatosis) can cause oxidative stress in the gut. However, transferrin is not a direct marker of gut health. It does not measure gut barrier function, inflammation (like calprotectin), or microbial composition. In clinical practice, transferrin is part of an iron panel (with ferritin, serum iron, transferrin saturation). For a comprehensive gut health assessment, additional stool markers (e.g., calprotectin, occult blood) and possibly colonoscopy are needed. The evidence for transferrin's usefulness specifically for gut health is moderate and indirect. Decisions should be made with a healthcare provider.