Is Leaky Gut Test useful for Blutzucker?

The usefulness of a Leaky Gut Test for blood sugar (glucose control) is not well supported by current evidence. While some research suggests that increased intestinal permeability ('leaky gut') may contribute to systemic inflammation and insulin resistance—both relevant to blood sugar regulation—the evidence for a direct causal link and clinical utility remains weak. Most commercial leaky gut tests measure markers such as zonulin or the lactulose/mannitol ratio, but their validity, standardization, and predictive value are debated. These tests are not part of standard diabetes or prediabetes diagnostics. For blood sugar management, established parameters like fasting glucose, HbA1c, and oral glucose tolerance tests, along with lifestyle interventions (diet, exercise), remain the gold standard. A leaky gut test might be considered in a broader context if there are unexplained gastrointestinal symptoms or suspected inflammatory bowel disease, but it should not be used as a primary tool for assessing or managing blood sugar. The evidence level is 'mixed': mechanistic and animal studies exist, but robust human trials demonstrating clinical benefit are lacking.