Is Nährstoffcheck useful for Abnehmen?

Whether a nutrient check (Nährstoffcheck) is useful for weight loss is not well supported by current evidence. These tests typically measure blood levels or genetic markers for vitamins, minerals, or fatty acids. While deficiencies can affect metabolism, a direct causal link to weight loss is unproven. The evidence is mostly mechanistic or from small observational studies; robust randomized trials are lacking. Moreover, direct-to-consumer tests often overstate the relevance of single markers. A nutrient check may be reasonable if a genuine deficiency is suspected (e.g., vitamin D, iron), but it is not a validated tool for weight management. Without professional interpretation, it risks unnecessary supplementation or false conclusions. Evidence grade: unclear/marketing. Sources: no specific PMIDs in context.