Myths vs facts: Leaky Gut Test and Blutzucker

The question of myths vs facts about leaky gut tests and blood sugar is important. Leaky gut tests (e.g., stool zonulin) are often marketed as indicators of intestinal permeability, but scientific evidence is weak. Zonulin is not a specific marker, and these tests lack standardization and clinical validation. Blood sugar, in contrast, is a well-established biomarker with clear reference ranges. Some DNA tests claim links between gut health and blood sugar via genes like TCF7L2 or BDNF, but effect sizes are small and insufficient for personalized dietary advice. Fact: Stable blood sugar depends primarily on diet, exercise, and weight, not on a leaky gut test. Myth: A positive leaky gut test proves a treatable disorder. Most offered tests are marketing, not medicine. Be cautious of self-treatment with expensive supplements. If you have real symptoms, consult a gastroenterologist.