Is FTO useful for Schlaf?

Based on the provided context, there is no direct information about FTO and sleep. FTO is primarily associated with obesity and metabolism. Some research suggests weak links between FTO variants and sleep traits like duration or quality, but the evidence is inconsistent and effect sizes are small. Consumer DNA tests like MyBody-X may report FTO variants, but their utility for sleep is unclear. The context emphasizes that DNA tests indicate tendencies, not causes, and lifestyle factors dominate sleep outcomes. Therefore, FTO is not considered useful for actionable sleep insights. Evidence grade: mechanistic/unclear. Caveat: No strong human studies support using FTO to guide sleep interventions.