Is Transferrin useful for Blutzucker?

Transferrin is an iron transport protein and not a direct marker for blood sugar. Some research suggests links between iron metabolism and glucose homeostasis—for example, iron overload may worsen insulin resistance. However, transferrin itself is not an established biomarker for assessing blood glucose levels or diabetes risk. Clinically relevant markers are fasting glucose, HbA1c, and sometimes insulin. Measuring transferrin can be useful in evaluating iron status, but not for blood sugar. The evidence for a direct utility of transferrin in blood sugar management is weak and mechanistic. Consumer tests that promote transferrin as a blood sugar indicator likely overstate its value. Caveat: transferrin levels are influenced by inflammation, iron deficiency, and liver disease, which can confound interpretation.