Nährstoffcheck: what does this mean exactly?

The term 'Nährstoffcheck' (nutrient check) in the context of MyBody-X refers to a test that analyzes genetic variants associated with the uptake, metabolism, or requirement of specific nutrients (e.g., vitamins, minerals). Such tests are often based on candidate gene studies or GWAS, but effect sizes are typically small and heavily modulated by diet, lifestyle, and gut microbiome. A positive finding does not indicate a deficiency or disease, only a statistical predisposition. Clinical utility is limited, and major nutrition societies (e.g., DGE, AND) do not recommend routine genetic testing for dietary optimization without medical supervision. Evidence: human-moderate to mechanistic. Caveat: Genotype alone cannot replace biomarker blood tests; personalized advice requires integration of multiple factors.