3. We need eight hours of sleep to help our body restore at night. If your last meal is at 6 p.m. and you go to bed at 11 p.m., it means you stay without food for over 12 hours. Your body goes to starvation mode and all of your processes slow down, including metabolism. Have a proper meal in the evening. Make the right choice and eat vegetables and protein. Avoid fatty and sugary foods. Salty snacks should also be avoided.