Is Ferritin useful for Blutzucker?

Ferritin is an iron storage protein and a key biomarker for the body's iron status. It is not a direct measure of blood sugar, but there are indirect links: elevated ferritin (iron overload) can promote oxidative stress and impair insulin sensitivity, potentially contributing to higher blood glucose levels. Additionally, ferritin is an acute-phase reactant that rises with inflammation, and chronic inflammation is a risk factor for insulin resistance. Conversely, low ferritin (iron deficiency) can also disrupt glucose metabolism. However, ferritin is not a standard marker for blood sugar control; fasting glucose, HbA1c, and oral glucose tolerance tests (OGTT) are the established parameters. A ferritin level in the upper normal range or above should be considered a possible indicator of metabolic risk. The evidence for ferritin's utility as a blood sugar marker is moderate, based mostly on epidemiological and mechanistic studies. An isolated ferritin value without other iron parameters (transferrin saturation, serum iron) has limited interpretability. If ferritin is abnormal, medical evaluation for hemochromatosis or inflammatory conditions is warranted.