When is Ballaststoffe Genetik actually useful?

The question of when dietary fiber genetics is actually useful cannot be answered with evidence at present. Although certain gene variants (e.g., in TCF7L2, FTO, or SIRT1) may influence metabolism or satiety, their individual effects are small and insufficient for personalized fiber recommendations. Randomized controlled trials (RCTs) show no clinical benefit from DNA-based diet personalization (PMID: 37813841). Consumer genetic tests often overstate the significance of such markers. Fiber is beneficial for everyone regardless of genetics. Therefore, genetic analysis does not provide actionable guidance for fiber intake. Instead, follow general guidelines (e.g., 30 g/day). Evidence: unclear, as no specific studies on fiber genetics are present in the context.