To sleep well is to fall asleep easily, sleep through the night without waking, and to wake in the morning feeling rested and ready to face the day. These things, moreover, should all happen at similar times of the day. Having a regular rhythm allows our bodies to prepare for sleep to optimize our internal environment for resting and rejuvenation, and it allows our bodies to prepare for the day to optimize for wakefulness, energy, and success.
Why might NAC before bed help someone achieve what feels like a deeper sleep?