Human bodies produce extra protein when sleeping that helps to fight infections and strengthen the immune system. Increasing one's sleep helps to repair cells that have been exposed to stress, pollutants and infectious bacteria. According to the Division of Sleep Medicine, Harvard Medical School, people often disregard the health consequences that result from insufficient sleep.
Scientists have recently identified the connection between inadequate sleep and diseases. Getting enough high-quality sleep is as important as eating well and exercising daily. Increasing your hours of sleep each day may help fight medical conditions, such as obesity, diabetes and cardiovascular disease.