Sleep is another underrated part of a proper fat-loss program. If you aren't sleeping enough, your insulin sensitivity will decrease, which means that hormone will be less effective at shuttling glucose from your blood into cells, where it belongs. So what does your body do? It pumps out more insulin, still hoping to finish the job. The problem is that insulin is also a fat-storage hormone.
Since your cells will be starved for glucose also means you'll encounter carbohydrate cravings and lousy workouts.
Few healthy food choices are made after midnight. Going to bed an extra hour early is also a perfect way to combat night-time eating, which can be disastrous to your progress.