Evidence check: Nährstoffcheck in the context of Abnehmen

A nutrient check (e.g., blood test for vitamins and minerals) is often marketed for weight loss. However, the scientific evidence that correcting nutrient deficiencies alone leads to significant weight loss is weak. While deficiencies (e.g., vitamin D, magnesium) may affect metabolism or satiety, the effects are generally small and insufficient for sustainable weight reduction without a calorie deficit. Most studies are observational or mechanistic; randomized controlled trials (RCTs) are largely lacking. Moreover, many commercial tests lack standardization and their interpretations are often exaggerated. A nutrient check can be useful if a specific deficiency is suspected (e.g., due to restrictive dieting), but as a standalone weight-loss strategy it is not evidence-based. Caveat: None of the provided sources demonstrate a causal link between nutrient testing and weight loss.