What to watch with Nährstoffcheck and Blutzucker?

When combining a nutrient check (Nährstoffcheck) with blood glucose (Blutzucker) testing, caution is warranted. Nutrient checks typically measure circulating levels, which may not reflect total body stores (e.g., magnesium, vitamin D). Blood glucose is a well-validated marker but is highly variable depending on fasting state, recent meals, stress, and medications. Merging these results can lead to overinterpretation—for instance, attributing glucose fluctuations to a borderline nutrient level without clinical context. Evidence from large trials (DIETFITS, JAMA 2018) shows no benefit of genotype-based diet matching. Microbiome tests provide only lifestyle guidance, not medical diagnosis. No consumer test replaces a clinical evaluation. Be aware that many home tests lack regulatory approval for diagnosis or treatment decisions. Always consult a healthcare professional before acting on abnormal results.