Myths vs facts: Nährstoffcheck and Sport

The idea that a nutrient check (e.g., via DNA test) directly and reliably provides the optimal sports supplement plan is a myth. The provided context shows: an MMP1 variant says little about skin aging, and GSTM1 null variants affect detox capacity, but clinical relevance for athletes is unclear. The VDR gene variant effect on hormones is small, and leptin-melanocortin pathway mutations are rare. Fact: nutrient needs in sports are primarily determined by training intensity, duration, diet, and individual tolerance. DNA-based checks can offer mechanistic hints (e.g., vitamin D needs with VDR variants), but they do not replace blood tests or dietary counseling. Marketing often overstates predictive power. Safety note: supplements without deficiency can be unnecessary or even harmful (e.g., high doses of fat-soluble vitamins). A reputable nutrient check should combine biomarkers (blood, stool) and lifestyle, not just genes.