Myths vs facts: CYP2D6 and Darmgesundheit

CYP2D6 is a liver enzyme primarily responsible for metabolizing many drugs, not directly for gut health. A common myth claims that certain CYP2D6 variants cause bloating or irritable bowel. In reality, there is no robust human evidence for a direct link between CYP2D6 polymorphisms and the gut microbiome or intestinal barrier. Some studies (e.g., on opioid or antidepressant metabolism) show indirect effects: poor metabolizers may experience gastrointestinal side effects due to altered drug levels. However, this is not a genetic influence on gut health per se. Direct-to-consumer tests linking CYP2D6 to 'gut health' are scientifically unsupported. The evidence is mechanistic or speculative. Anyone with genuine gut issues should consult a physician rather than rely on genetic tests.