welche allergien gibt es — can a microbiome test help?

The question of whether a microbiome test can help with allergies requires a nuanced answer. Allergies are immune overreactions to normally harmless substances (allergens) like pollen, dust mites, pet dander, mold, or foods. Diagnosis is typically based on history, skin prick tests, and specific IgE antibodies. A microbiome test (e.g., stool analysis) does not directly diagnose allergies, as it measures gut bacterial composition, not immune responses to allergens. However, emerging research links gut microbiome diversity and composition to allergic diseases such as eczema, asthma, and food allergies. For example, low diversity in infancy is associated with higher allergy risk. Yet the evidence is mostly mechanistic and observational; no validated microbiome-based allergy test exists for clinical use. Such a test may provide general insights into gut health but cannot replace standard allergy diagnostics. Therefore, the evidence level is 'mechanistic'.