What should I know about alkoholunvertraglichkeit test?

An alcohol intolerance test, such as those offered by MyBody-X or similar providers, typically analyzes the rs671 SNP in the ALDH2 gene. This variant is common in East Asian populations (approx. 30–50 %) and reduces aldehyde dehydrogenase activity, causing facial flushing, nausea, and headaches after alcohol consumption. Importantly, MyBody-X tests are marketed as lifestyle products – they do not provide medical diagnoses and should not replace a doctor's consultation. The KombiCheck mentioned in the context measures IgG and IgE antibodies against foods and environmental allergens, but not specifically ALDH2 activity. A genetic test for rs671 can indicate a genetically based intolerance, but the effect size is moderate and clinical relevance is limited on an individual level. In Germany, genetic testing is regulated by the Genetic Diagnostics Act (GenDG), which restricts non-medical testing for minors. Anyone seeking a medical evaluation of alcohol intolerance should consult a gastroenterologist or genetic counselor. The evidence for rs671 is solid (GWAS), but its use as a lifestyle hint should be interpreted cautiously.