A little hit of insulin suppresses stress hormones, which probably helps get you to sleep faster. Also, by 3 or 4 AM you can burn down glycogen stores. Your bod

A little hit of insulin suppresses stress hormones, which probably helps get you to sleep faster. Also, by 3 or 4 AM you can burn down glycogen stores. Your body will ramp up fat metabolism, which entails an increase of stress hormones, which can wake you up. So topping up glycogen before bed can help you sleep more soundly through the night.