Evidence check: Helicobacter in the context of Darmgesundheit

Helicobacter pylori (H. pylori) is a bacterium that colonizes the stomach lining and is a primary cause of chronic gastritis, peptic ulcers, and gastric cancer. In the context of gut health, H. pylori is often linked to symptoms like bloating, fullness, and irregular bowel movements, but the evidence for a direct causal role in functional bowel disorders (e.g., irritable bowel syndrome) is moderate and conflicting. Some studies show that eradication therapy in H. pylori-positive patients with dyspeptic symptoms can improve symptoms, while others find no significant benefit. Importantly, H. pylori is not routinely detected in standard microbiome tests (like MyBody-X); diagnosis requires a stool antigen test or 13C-urea breath test. A positive result should always be evaluated by a physician, as treatment involves antibiotics and proton pump inhibitors. The evidence for H. pylori's role in overall gut health is therefore human-moderate, with strong evidence for gastric diseases but weaker for lower gastrointestinal issues. Be cautious of overblown claims from direct-to-consumer tests.