Is Fitness | LifestyleCheck useful for Abnehmen?

The MyBody-X Fitness | LifestyleCheck is a DNA test that analyzes genetic variants linked to fitness, metabolism, and weight regulation. For weight loss (Abnehmen), its direct utility is limited. Evidence is primarily based on GWAS associations, not clinical intervention trials. Individual SNPs (e.g., in FTO, MC4R) have small effects on BMI and explain only a fraction of weight variation. The test cannot provide personalized diet or exercise recommendations with proven efficacy. Weight loss is predominantly determined by calorie balance, physical activity, sleep, and stress management—factors the test does not measure. Moreover, the test falls under the German Genetic Diagnostics Act (GenDG) and is not a medical device; it must not be used for diagnosis or treatment planning. For evidence-based weight reduction, medical consultation, dietary tracking, and behavioral changes are far more relevant. The evidence rating is therefore 'marketing' or 'unclear', as the actual clinical relevance for weight loss is not substantiated.