What role does Insulin play in sleep?

Insulin plays a complex, indirect role in sleep. It regulates blood glucose, and fluctuations can affect sleep-wake cycles. Elevated insulin levels (e.g., in insulin resistance) are associated with sleep disturbances such as obstructive sleep apnea and reduced sleep quality. Additionally, insulin interacts with the circadian system: melatonin secretion and insulin secretion mutually influence each other. However, the evidence is mixed—many studies are associative or mechanistic without clear causality. The provided context lacks specific information on insulin and sleep, so this answer is based on general physiological knowledge. For personalized insights, blood glucose and sleep measurements, along with cautious genetic testing (e.g., for CLOCK genes), may be considered, but with limited actionable evidence.