Is Nährstoffcheck useful for Schlaf?

The Nährstoffcheck (nutrient check) by MyBody-X analyzes biomarkers and genetic variants related to nutrient status. Some nutrients (e.g., magnesium, vitamin D, B vitamins) can indirectly affect sleep quality – for example via melatonin synthesis or muscle relaxation. However, the check is not specifically designed for sleep, and the evidence for a direct improvement of sleep through such tests is weak. The results should be seen as a general orientation, not a diagnosis. A blood test for 25‑hydroxyvitamin D or magnesium is often more actionable. Moreover, genetic effects (e.g., VDR variants) are usually small and can be overridden by lifestyle. Therefore, the usefulness for sleep is limited and not evidence‑based. For sleep issues, consult a physician.