“I don’t even enjoy that cookie, but I just can’t help eating it. Why?”

You may have been asking yourself this question repeatedly for a decade, but still haven’t found the answer. 

And you may have spent years dieting thinking discipline is the gap — only to see the self-control problem growing deeper.

On the internet today, I haven’t seen a weight loss or eating expert provide a precise, accurate, research-backed explanation to a question this fundamental — and I’m closing that gap today.

Here’s why it matters for you:

Solving the problem requires understanding the problem first.

And having served people with chronic toxic eating and weight patterns for a decade, I can see that most people who are deep in the problem have never been given a fair answer.

Simply put, there are two separable components of reward that matter here: “liking” and “wanting.”

“Wanting” is motivation driven (I’m motivated to eat it) and “liking” is mainly  pleasure driven (I enjoy eating it). 

The two are orchestrated by different brain circuits.

“Wanting” — motivational pull — is generated by large, robust mesolimbic dopamine systems (Robinson & Berridge, 2016), while “liking” — the actual pleasure of consumption — is mediated by small, fragile systems that are not dopamine-dependent (Robinson & Berridge, 2025). 

People often say “I eat because I need dopamine” as if dopamine means pleasure. Here’s the important distinction about dopamine: 

Dopamine is often casually described as the brain’s “pleasure chemical.” In fact, it’s more about motivation (wanting) and reward-related learning than pleasure itself. 

So you may eat the chocolate because you feel motivated to eat it, and it’s a learned pattern. It doesn’t need to be pleasurable. 

Wanting and liking often travel together. But im multiple studies, we find they can dissociate: something can acquire powerful motivational pull even when its actual hedonic payoff — pleasure —  is modest.

The above is the trigger part, now looking at the control part is equally important because thoughts and impulse don’t just translate into behaviors directly. When there’s the drive to eat, the brain needs to select the action of eating for eating to happen. 

If we categorize behaviors as goal-directed behaviors (“The chocolate is worth having, therefore I’m eating it”) and habitual behaviors (“I’m just eating it because I always want it”)…

In rodent studies, we find the goal-directed hebaviors depend heavily on the dorsomedial striatum (Yin et al., 2005) whereas the habitual behaviors depend on the dorsolateral striatum (Yin et al., 2004). 

The striatum sits within cortico-basal-ganglia circuits that help translate information about cues, actions and outcomes into behavior. With learning, different striatal circuits can exert different forms of control over the same action.

So goal-directed and habitual behaviors depend heavily on different regions of the dorsal striatum

The dorsomedial striatum, which is critical for goal-directed behavior, encodes action–outcome contingency — the causal relationship between doing this and getting that (Yin et al., 2005). Think of it as part of the circuitry that helps open or close the gate on an action according to the expected outcome and what that outcome is currently worth.

The key point here is this: 

As behavior becomes habitual, control becomes less dependent on continuously evaluating the current value of the outcome. In computational terms, it starts behaving more like a cron job: cue → learned response → repeat.

This is one way ‘I can’t control it’ can arise mechanistically. It is not that the person likes it too much to resist. You can fully believe the food is harming you and eat it anyway because it has started to behave like a cron job now. 

This also means control isn’t a personality trait. It’s a state that’s context-dependent. The same person is genuinely goal-directed at 2pm and fully habitual at 9pm. Nothing about her changed — which is why “try harder” has never worked, and why the fix is structural, not motivational.

To fix this, you need to reroute the response. My clients could run complex organizations and projects but still blamed themselves for being weak for decades because they couldn’t resist the cookies and let their weight go out of control. It took <10 weeks of scientific rewiring to let go of a pattern that had run their life.