Myths vs facts: Skincare DNA and longevity

The claim that a DNA test can reliably predict which skincare routine slows aging or extends lifespan is not supported by robust science. While certain genetic variants (e.g., in FADS2 affecting omega-3/6 conversion, or genes related to collagen and antioxidant defense) may theoretically influence skin aging, effect sizes are small and evidence comes mostly from mechanistic studies or small association analyses. Randomized controlled trials demonstrating clear benefit of genotype-guided skincare for longevity are lacking. Longevity is a complex trait influenced by hundreds of genes, environment, lifestyle, and chance. A single skin DNA test cannot provide actionable recommendations for life extension. Marketing claims greatly overstate the predictive power. Proven strategies remain: sun protection, balanced diet, no smoking, adequate sleep. The evidence for skincare DNA tests in the context of longevity is best rated as 'mixed' – suggestive but not clinically validated.