What to watch with Nährstoffcheck and sleep?

When combining a nutrient check with sleep, be cautious. A nutrient check (blood or DNA-based) can indicate deficiencies that might affect sleep, such as magnesium, vitamin D, B vitamins, or iron. However, the evidence for direct causal effects is mostly weak (observational or mechanistic). A single test cannot determine your sleep quality, as sleep depends on many factors (stress, light, circadian rhythm). Don't fall for marketing claims that promise 'sleep optimization' through supplements. If values are abnormal (e.g., low magnesium), consult a doctor and adjust your diet before buying expensive supplements. A blood test is more reliable than a DNA test for nutrient status. Bottom line: use the check as a hint, not a diagnosis.