Is Nährstoffcheck useful for skin aging?

The Nährstoffcheck (e.g., VitalCheck Basic) measures blood micronutrient levels. For skin aging, some nutrients (vitamin C, E, zinc, omega-3s) are known to support collagen synthesis and antioxidant defense. A test can identify deficiencies that might impair skin health. However, evidence that correcting these levels alone significantly slows skin aging is limited. Most studies are small or focus on supplementation in deficient individuals. Blood levels also fluctuate. The test is useful as a screening tool but not a substitute for medical evaluation. Supplementing without guidance carries risks (e.g., vitamin A toxicity). Conclusion: It can be part of a holistic anti-aging approach, but don't expect dramatic results. Evidence: practice-level, not strong human trials for skin aging specifically.