Evidence check: Nährstoffcheck in the context of Allergie

A 'nutrient check' in the context of allergies is often marketed as personalized nutrition, but the scientific evidence is weak. While genetic variants in inflammatory genes such as CRP (rs1205) and FADS1 (rs174546) may influence immune regulation, they are not specific to allergies and explain only a small fraction of risk. Microbiome tests for children with stomach issues or for butyrate optimization are explicitly unsupported in the provided context. The role of bitter taste receptors (TAS2R38) in food choice and allergy risk is mechanistically plausible but clinically unvalidated. A nutrient check cannot replace allergy diagnostics (skin prick test, specific IgE). Evidence for direct nutrient–gene interactions in allergies remains mostly mechanistic or observational. Consumers should be wary of tests claiming to identify 'allergic food intolerances' from genetic or microbiome data alone. A doctor-led approach combining clinical history, validated allergy tests, and evidence-based dietary adjustments is recommended.