What role does FTO play in Schlaf?

FTO is primarily known for its strong association with obesity and appetite regulation. Some studies have explored links to sleep traits such as duration, quality, and circadian timing. Evidence is mixed and often confounded by BMI. Carriers of risk variants (e.g., rs9939609) may have slightly increased odds of short sleep or sleep disturbances, but effect sizes are small and not clinically actionable. Consumer DNA tests that claim FTO directly affects sleep should be interpreted with caution. The evidence is moderate but insufficient for specific interventions. Further research is needed to confirm independent effects of FTO on sleep.