Is Skincare DNA useful for allergy?

The usefulness of skincare DNA tests for allergies is limited. While certain genetic variants (e.g., in the filaggrin gene) are associated with skin barrier dysfunction and atopic dermatitis, the effect sizes are small and consumer tests often overstate their predictive power. Clinical allergy testing (skin prick, specific IgE) remains the standard. Environmental triggers, diet, and microbiome play a larger role. A DNA test may indicate a predisposition, but it cannot diagnose allergies or guide skincare with high reliability. Evidence is best classified as 'marketing' or 'mixed': some GWAS associations exist, but practical utility for personalized skincare is unproven. Consumers should be cautious of claims that a DNA test can replace medical advice.