When it comes to your health, there’s no aspect that’s more important than sleep. When you’re regularly getting the recommended amount of sleep — that’s at least 7 to 9 hours a night — your body has everything it needs to function properly. Sleep can have a big impact on your metabolism, energy levels and even your ability to make healthy food choices. If you’re trying to lose weight, get plenty of sleep each night. Lack of sleep can make you crave high-calorie foods. It can also cause you to feel hungrier throughout the day — which could lead to overeating .