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.
A diet high in protein, with less stress and more sleep can help you grow a faster beard. Protein gives your body the right nutrients to grow more hair, and sleep is the necessary time to put it all into place. Drinking the recommended eight glasses of water a day will help keep the growth thick and healthy.