Is Nährstoffcheck useful for Haut?

Whether a nutrient check (Nährstoffcheck) is useful for skin health cannot be answered with a simple yes. These tests are often marketed as 'skin panels' claiming to identify deficiencies in vitamins, minerals, or fatty acids that might cause dryness, acne, or premature aging. The scientific evidence supporting their utility is weak. While certain nutrients (e.g., vitamin C, E, zinc, omega-3s) are known to influence skin function, a broad, unspecific screening rarely yields actionable insights. Many measured parameters fluctuate with diet and time of day, and reference ranges for 'optimal skin health' are not established. No robust randomized controlled trials demonstrate that test-guided supplementation significantly improves skin outcomes. Consumer tests often lack clinical validation and are susceptible to laboratory variability and preanalytical errors. A nutrient check may serve as a rough orientation but cannot replace a dermatologist's evaluation for specific skin conditions. For genuine skin concerns, targeted testing (e.g., iron, vitamin D) under medical supervision is more appropriate. The evidence for a general nutrient check for skin is best described as marketing-driven.