You know how it feels. It is five in the afternoon, or Sunday evening, or right when you close your laptop after a long day. It starts as a faint pull. Then it becomes a thought. Then you are already on your way to the fridge, the phone, the bottle — something.
It is not random. Nor is it a personality flaw. It is your brain doing exactly what it is built to do.
The brain is not built for sobriety. It is built for survival.
The reward system — the network of structures in the brain governing motivation, pleasure and craving — is one of evolution's most refined systems. It is designed to drive us to seek food, connection, safety. Each time we find what we are looking for, dopamine is released, and the brain stores the information: this worked, do it again.
In a world of natural rewards, the system works well. But in our world — filled with sugar, alcohol, social media, rapid dopamine in every pocket — the system can easily start playing tricks on us.
Natural rewards like food, social contact and movement activate the reward system in a regulated and sustainable way. But artificial stimuli like alcohol and drugs can hijack the system and trigger an abnormally high dopamine release — and over time the brain adapts by reducing its natural dopamine production and receptor sensitivity.
Translated into everyday language: the more we turn to quick fixes, the harder it becomes to feel satisfied without them.
The void nobody talks about
There is a state that has neither a good name in everyday English nor a simple word in any other language — but most people recognise it. It is not depression. It is not anxiety. It is a kind of low-level restlessness. A feeling that something is missing, without quite knowing what.
Neurobiologically it has a name: anti-reward state. It is the state the brain enters when the reward system has adapted to recurring stimulation. Research describes it as a state of diminished reward system function combined with the recruitment of an “anti-reward system” — the brain oscillates between compulsive reward-seeking and a chronic stress state.
That is the void. And it is not weakness — it is neurobiology.
Why the craving returns even when you know better
One of the most frustrating experiences for someone trying to change a behaviour is that knowledge is not enough. You know a glass of wine won't solve the problem. You know that scrolling won't give you what you're looking for. And yet you do it anyway.
This is because the dopamine system does not work with logic — it works with association and anticipation. In addiction and habit, the dopamine system is triggered by cues associated with the reward — a place, a time of day, a feeling — creating heightened motivation to seek the substance alongside a weakened capacity for self-regulation.
That is why five o'clock feels different from three o'clock. It is not that you are weak. It is a learned pattern in the brain's chemistry.
What actually changes the system
The good news: the brain has plasticity. It can relearn. And there are factors that actively support that process.
1. Glutamate balance
As described in the article on NAC, the glutamate system plays a central role in cravings and impulse control. Chronic alcohol consumption leads to a hyperglutamatergic brain — a state of chronic overactivation in the circuits governing reward and memory. Supporting glutamate balance is one of the most directly relevant interventions for quieting the background noise of craving that many people describe.
2. Nervous system stability
Myo-inositol, magnesium and B vitamins play a role in the signalling that regulates mood and stress response. A nervous system in chronic imbalance is a nervous system constantly seeking recovery — often via the fastest routes it knows.
3. The ritual itself
It is often underestimated: having a daily ritual that gives something — rather than just removing something — serves an important psychological function. The brain does not always seek intoxication or relief; it often seeks meaning, structure and a sense of control. A conscious ritual can answer that need without borrowing from tomorrow.
Sitting with the void
There is a paradox in all of this: the only real way out of the void is to learn to sit with it a little longer. To tolerate that low-level restlessness without immediately filling it.
That is hard. It is entirely normal that it is hard. And it is not a project you need to take on alone, through sheer willpower and white knuckles.
It is a project where the brain needs the right conditions. Sleep quality, movement, social support — and yes, the right nutrition for the nervous system — all play a role. Not because they take away the void. But because they make it a little easier to be in it without needing to flee.
A final thought
It is easy to view cravings and impulses as a character problem — something you should be able to overcome with sufficient effort. But neuroscience describes a different picture: a brain that has adapted to artificial stimulation progressively loses its ability to experience satisfaction from natural rewards — and the individual becomes increasingly dependent on artificial stimulation just to feel normal.
It is not character. It is chemistry. And chemistry can be influenced.