Myths vs facts: AllergieCheck | IgE-Antikörper Test and blood sugar

The AllergieCheck (IgE antibody test) measures specific IgE antibodies against allergens and is used to diagnose type I allergies (e.g., pollen, pet dander, foods). A common myth is that this test can also provide information about blood sugar issues or diabetes. That is false. IgE antibodies have no direct connection to glucose metabolism. Blood sugar is regulated by hormones like insulin and glucagon, not by IgE. While total IgE can be elevated in certain conditions (e.g., parasites, immune disorders), it is not a marker for blood sugar. There is no evidence for such a link. To assess blood sugar, one needs fasting glucose, HbA1c, or an oral glucose tolerance test. The AllergieCheck is not suitable for that. Caveat: Some marketers wrongly promote IgE tests as 'allergy-intolerance checks' – but IgE tests are only valid for true allergies, not for food intolerances (and IgG tests are also not scientifically validated for that purpose).