wie gesundheit verbessern — what are common causes?

The question of common causes for improving health is complex and requires an evidence-based approach. Classic factors like balanced diet, regular exercise, adequate sleep, and stress management are supported by strong human studies. However, DNA tests (e.g., MyBody-X DNA nutrition test) have limited predictive power; most SNPs have small effects, and lifestyle factors dominate (evidence: marketing/unclear). IgG-based food intolerance tests (e.g., NutriCheck) are rejected by medical societies – IgG4 indicates exposure, not intolerance (PMID:36389804; PMID:37705676). For supplements, upper intake levels must be respected: EFSA set a UL for vitamin E at 300 mg/day in 2024 (older IOM UL: 1000 mg/day), and for selenium at 255 µg/day (2023) based on hair loss in SELECT. High-dose vitamin E is associated with increased mortality. The FTO gene (16q12.2) is linked to obesity, but the effect is moderate and modifiable by lifestyle. Conclusion: The most common causes for health improvement lie in proven lifestyle changes, not in expensive genetic tests or unvalidated IgG tests. Beware of deterministic interpretations.