What should I know about dna testing?

Consumer DNA tests (e.g., from MyBody-X) can identify specific genetic variants, but their clinical utility is often limited. Most polygenic risk scores for cholesterol, inflammation, or athletic performance are based on small effect sizes and are not diagnostic. The provided contexts rate many claims (e.g., GPX1 or FADS1) as 'marketing' or 'unclear'. A DNA test does not replace standard medical lab work (e.g., lipid panel, hsCRP) or professional medical advice. Lifestyle factors (diet, exercise, sleep) generally have a greater impact than individual SNPs. Caution: supplementing based solely on a genotype can be risky (e.g., high-dose vitamin E or beta-carotene). Evidence for personalized diets from microbiome or DNA tests is weak. Bottom line: DNA tests offer interesting insights but not reliable action plans. Always consult a doctor before making changes.