Substance use disorder occurs when a person needs alcohol or another substance (drug) to function normally. Abruptly stopping the substance leads to withdrawal symptoms. Addiction means that a person has a strong urge to use the substance and cannot stop, even if they want to.
So it is important to maintain positive nitrogen balance in the body while sleeping. When you do and conditions are right so that your rate of protein synthesis exceeds your rate of degradation, and you maintain a positive nitrogen balance, you can grow while you sleep.
Certain phases of sleep help you. 1  Feel rested and energetic the next day. 2  Learn information, get insight, and form memories. 3  Give your heart and vascular system a rest. 4  Release more growth hormone, which helps children grow. 5  Release sex hormones, which contributes to puberty and fertility.