Evidence check: Skincare DNA in the context of Allergie

The question of whether 'skincare DNA' tests are meaningful in the context of allergies requires careful scrutiny. The provided knowledge sources contain no direct evidence for genetic markers that specifically predict reactions to skincare products or allergic responses. While genes like FLG (filaggrin) are well-established in atopic dermatitis research, they are absent from the given context. The mentioned FUT2 and TAS2R38 variants have no proven link to skin allergies. The antibiotic–microbiome data highlight that even for gut recovery after antibiotics, no validated clinical biomarkers exist – the same applies even more to the skin microbiome. Many commercial DNA tests for skincare rely on mechanistic or correlational data that have not been confirmed in clinical trials. A positive variant does not automatically indicate an allergy or intolerance. Without accompanying clinical symptoms and medical evaluation, such results can be misleading. The evidence level is best described as 'marketing' or 'unclear'. Consumers should remain skeptical and not base skincare decisions solely on DNA results.