What should I know about DNA Test Test?

A consumer DNA test like MyBody-X's can identify genetic variants that influence folate metabolism (MTHFR) or mineral needs (TRPM6 for magnesium, SLC30A8 for zinc). However, the effect sizes of these variants are typically small, and the clinical utility is limited. Many health scores are based on GWAS associations, not robust RCTs. A DNA test is not a substitute for blood work: nutrient deficiencies are more reliably assessed via serum markers (ferritin, vitamin D, B12). MyBody-X itself labels its DNA tests as screening tools – abnormal results should be followed up with a doctor. Critically, consumer DNA tests cannot reliably predict drug–gene interactions (e.g., lisinopril and potassium). For athletes, the benefit is questionable: while SNPs may hint at higher needs, a blood test is more direct and actionable. In summary, DNA tests offer interesting clues, but the evidence is mixed (some GWAS, some practice, some marketing). They should never be used alone for diet or supplement decisions. Consulting a physician or dietitian is essential to interpret results properly.