What should I know about FTO Test?

The FTO test analyzes a common variant (e.g., rs9939609) robustly associated with BMI and obesity risk in large GWAS. The effect size is modest: carriers of the risk allele have about a 30% higher odds of obesity, but the actual weight difference is typically 2–3 kg. The test indicates genetic predisposition, not a diagnosis. Lifestyle factors (diet, exercise, sleep) have a much stronger impact on body weight. Moreover, the predictive value is limited by population-specific effects and lack of validated personalized dietary recommendations. The test should be used as a general awareness tool, not a prescription. Always consult a healthcare professional for weight management.