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.
This gets straight to the source: sleep regulates your leptin and ghrelin levels (ghrelin is the hormone that tells your body you're hungry). Not enough rest and your body starts producing ghrelin and not producing leptin. So hit the hay in time to get about 8 hours every night.