Myths vs facts: DNA Stoffwechseltest and Darmgesundheit

DNA metabolism tests combined with gut health claims are rife with myths. Fact: Certain variants like MTHFR C677T (common, but no proven benefit of methylfolate over folic acid per USPSTF 2023) and FTO (small effect on weight, no diet-specific prediction per POINTS RCT) have strong human evidence. The ALDH2 rs671 variant reliably explains alcohol flush in East Asians and increased cancer risk – evidence is strong. For gut health, DNA can indicate celiac disease risk via HLA-DQA1 (strong evidence), but most 'metabolism' tests overpromise. Microbiome tests are more direct but still not diagnostic. Myth: A single DNA test can determine your optimal metabolism or diet. Fact: Lifestyle, diet, and medical evaluation matter far more. Caution: avoid self-supplementation (e.g., methylfolate) without professional advice. Evidence is mixed: some human-strong, some marketing/unclear.