Why you can't walk past chocolate without taking some

The most widely shared study on the subject is from 2007 and comes from a team in Bordeaux, which had rats choose, at each trial, between a sip of sweetened water and a dose of cocaine injected directly into a vein. 9 out of 10 chose the sweet water. The preference stayed the same even in animals that had already been exposed to cocaine. The detail that usually gets lost is that the water was sweetened with saccharin, which has no calories at all, so the brain was not responding to energy, but to the sweet taste itself.

From here came the headline that travels all over the internet, that sugar is supposedly “8 times more addictive than cocaine”. The study says no such thing anywhere. It says that, for a rat, an intense sweet taste beats cocaine as a reward, which is disturbing enough even without invented numbers.

Around the same time, a team at Princeton showed what happens to rats that get sugar for only a few hours a day, after periods without it. They end up eating in bouts. They seek out the sugar insistently. When their access is cut off, they show signs of withdrawal. The key word is “intermittent”: the loop appeared in the animals that alternated deprivation with excess, not in those with unlimited sugar all the time. If you recognize yourself in the pattern “good all week, chaos at the weekend”, this is exactly what it is about.

Now the part that internet articles skip. In 2016, a team from Cambridge went through all the literature, in animals and in humans, and concluded that the evidence for a “sugar addiction” in humans is thin and that the term is premature. In humans, the behaviors that resemble addiction appear rather around eating in general and around highly processed foods, not around sugar taken on its own. So yes, sweet taste pulls hard on the reward circuit, like any natural pleasure. But “sugar addict” is not a diagnosis. Anyone who gives it to you with certainty is selling something. We describe the same reward loop in the article on alcohol addiction, where the evidence, however, is entirely different.

There is one more hypothesis, less often mentioned, that deserves to be told with all due caution. In 2014, 3 American researchers published an article with an uncomfortable question: could the bacteria in our gut be influencing our food choices in their own interest? The reasoning behind the question is evolutionary. Bacteria that feed on simple sugars thrive when we eat sweets, and they have at their disposal a direct channel to the brain, the vagus nerve, plus a few molecules that can change mood.

The image of a microscopic army lobbying for sweets is tempting and probably holds some truth. For now it remains a hypothesis with plausible mechanisms, not a conclusion demonstrated in humans. We mention it for 2 reasons. It explains why, for some people, the craving seems to come “from the stomach”. And it links the subject to something that can be measured and trained: the way the gut communicates with the brain, through the vagus nerve.

At the BrainMap Institute we don't give diets and we aren't nutritionists. What we work on is regulation. That is, how quickly the brain comes out of alert, how well you sleep and how hard 4 o'clock knocks you off balance. These are things that can be measured, trained and measured again at intervals, with the same method.

The training has a few components, and the plan is made according to the map, not according to a recipe. Neurofeedback trains the prefrontal areas, the ones involved in delaying an impulse, to work more steadily, and for compulsive eating there is a 2016 randomized study in women with binge eating episodes. Neurofeedback reduced the episodes more than a guided imagery technique with the same number of sessions. It is a promising result, in a small group. Its authors describe it as an addition to treatment, not as the treatment itself, and that is how we describe it too.

Vagal stimulation works on the gut-brain axis mentioned above, with gentle impulses, through an ear or neck device. The aim is for the nervous system to come out of “alert mode” more easily, and for satiety signals to no longer be drowned out by noise. At-home audio training, with binaural frequencies, is the daily routine between sessions. A few minutes with headphones on, during which the brain practices settling into slow rhythms. A lot is written online about serotonin and the “chemistry of happiness”. We stick to what we can measure before and after.

And now, where training stops. If the craving for sweets comes with episodes in which you eat a lot and fast, followed by shame, the subject is a different one. It is called an eating disorder, and the main path there is psychotherapy, with us alongside it, not instead of it. We have described the 5 eating disorders and their signs separately. If you have high blood sugar, diabetes in the family or you take medication, the first person you talk to is your doctor. What you put on your plate remains the job of a dietitian. Brain training is added on top of all this, never in place of it.

Come for an assessment, and that is all you commit to. We show you what your brain activity looks like, which areas are on alert and where the imbalance is. Then we decide together whether a plan makes sense and what it would look like. The recording takes 14 minutes and doesn't hurt.

Write to us at office@institutulbrainmap.ro or on WhatsApp at 0770 390 190.

The sweetness of life doesn't come from a wrapper. It comes from a brain that works in balance.

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