Sleep less, eat more
This strange change in eating habits stems from an imbalance of our hormones. When it’s time to eat, our stomach releases the hunger hormone ghrelin. When we’re full, our fat tissue releases another hormone, leptin – letting us know we’ve eaten enough. Sleep deprivation not only makes the levels of ghrelin go up, but it makes leptin levels go down – ever widening our gape for supersized meals and surplus snacking. Our sleepy preference for sweet and fatty foods can also be blamed on a shift in brain activity: the reward areas of our brain become overactive, while the decision-making parts slow down. And what is more rewarding than chips and chocolate?