What do studies say about Sportgene Ernährung?

Current scientific evidence for 'sport gene nutrition' – personalized dietary recommendations based on DNA tests for athletic performance – is weak. While GWAS have identified associations between certain gene variants (e.g., FTO, ACTN3) and metabolic or muscle traits, randomized controlled trials (RCTs) do not show clear benefits of genotype-matched diets over balanced, needs-based sports nutrition. Effect sizes are generally small and results vary across populations. Many commercial providers overstate the predictive power of single SNPs and mix evidence with marketing. Professional guidelines (e.g., from the Academy of Nutrition and Dietetics) advise against routine use of genetic tests for sports nutrition counseling. Instead, athletes should focus on established principles: adequate carbohydrate, protein, and fluid intake. A DNA test may serve as a curiosity or motivational tool but should not replace individualized advice from a qualified sports dietitian.