Carbohydrates: Illusions and Realities
“Glucose does not nourish the body; it burns it. Under the appearance of a fuel, it sustains the slow combustion of the living.”
🔍 No time to read it all? Here is the summary of this page:
Carbohydrates are not the fuel of life, but a flash in the pan that exhausts the body and clouds the mind.
The human body has no need for dietary glucose: it produces it naturally through gluconeogenesis, even for the brain areas that require it.
The myth that the brain is “glucose-dependent” stems from a confusion between exogenous and endogenous glucose, perpetuated by decades of nutritional misinformation.
Energy from sugar is unstable: it excites, oxidizes, and inflames, while energy from fats and ketones nourishes, stabilizes, and repairs.
Starches, depending on their structure, do not all have the same effect:
highly digestible starches cause blood sugar spikes as strong as sugar,
slowly digestible starches raise blood glucose more gradually,
only resistant starches, minimally processed, support the gut flora without raising blood sugar.
The sugar–insulin–fatigue cycle perpetuates addiction, weight gain, depression, and metabolic degeneration.
In Traditional Chinese Medicine, excess sweet flavor weakens the Spleen, creates dampness and phlegm, and unbalances the body’s vital energy.
Glycation is a slow caramelization that stiffens tissues, accelerates aging, and impairs mental clarity.
Sugar weakens willpower and discernment, perpetuating a mental and emotional fog that prevents full awareness.
Returning to a diet low in carbohydrates and rich in healthy fats means reclaiming clarity, stability, and the sovereignty of the living.
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The Myth of Sugar
For decades, the modern world has been built on a lie: that carbohydrates are the essential fuel of life. We were taught this in school, hammered with it in advertisements, printed on cereal boxes, and repeated in doctors’ offices: “The brain needs glucose,” “Starches are indispensable,” “Sugars are the energy of life.” This dogma has become so deeply entrenched that it has turned into a social truth, almost a moral one. Not eating carbohydrates is perceived as extreme, dangerous, almost heretical. And yet, almost everything about it is false.
Glucose does not nourish the body; it consumes it. Under the guise of energy, it exhausts the hormonal system, disrupts insulin signaling, inflames tissues, and drains the deep reserves of life. It creates the hunger it claims to appease, the dependence it feigns to relieve, and the slow degeneration it hides behind immediate pleasure. Sugar is not a food: it is a program. A chemical and behavioral addiction maintained for decades by the agri-food and pharmaceutical industries, which demonized fats — essential as they are — to glorify carbohydrates, far more profitable to produce, sell, and renew.
What we call “energy” after a sweet meal is nothing but a metabolic flash in the pan: an artificial surge obtained by burning our own reserves and exhausting our organs. Glucose provides a sensation of immediate energy, but its excessive use activates an overproduction of free radicals, triggers oxidative stress, and accelerates cellular degradation. The body believes it is nourishing itself, when in fact it enters a cycle of internal combustion that slowly weakens it. The energy derived from sugar is not sustainable energy: it excites, oxidizes, and exhausts, whereas the energy derived from fats nourishes, stabilizes, and repairs.
This dossier exposes the deception: how the idea of “sweet fuel” inverted the logic of life itself, replacing the stable flame of fats with an unstable blaze, gradually transforming humanity into a civilization burned from the inside — obese, sick, fatigued, dependent, spiritually extinguished. And yet, when the truth is placed before their eyes, many still reply: “Ah, but you have to enjoy yourself.” As if self-destruction were a right, as if slow death were a comfortable choice.
People prefer the sweetness of poison to the rigor of truth, because it spares them the effort of having to change. Because we have come to disparage effort, to flee any form of discipline. We have been lulled to sleep in a manufactured comfort, in a society where everything must be served on a silver platter, without movement, without will, without friction. Everything has been designed so that humans no longer struggle, no longer resist, no longer seek. And even when sick, many prefer to suffer or die rather than question their habits, so sweet is the illusion and so normalized has laziness become.
This article is for those who have decided to reclaim their sovereignty, to become masters of their own bodies once again, to take back what is rightfully theirs — their health, their clarity, their inner fire. It is for those who are ready to understand that freedom begins in the cell, in consciousness, and in every choice made when eating.
The Great Nutritional Lie
The great nutritional lie did not take hold overnight. It was built slowly, over several decades, at the crossroads of industrial, political, and medical interests. From the mid-20th century onward, a simplistic equation invaded minds: fat = danger, sugar = energy. This idea, promoted as scientific progress, was in reality the greatest metabolic hijacking in human history.
In the 1960s, several studies funded by the sugar industry deliberately diverted attention from the true culprits of cardiovascular disease. Animal fats were accused of being responsible for heart attacks, while sugars were absolved of all responsibility. This reversal shaped decades of misguided nutritional policies: cereals, pasta, juices, low-fat products, and industrial margarines were promoted, while butter, eggs, fatty meat, and natural cholesterol — essential for cellular health — were banned.
The result is now visible to the naked eye: never has humanity been so sick, so tired, so dependent on stimulants and medications. Obesity, diabetes, depression, cancers, and neurodegenerative diseases are exploding, while institutions continue to recommend the same “nutritional benchmarks,” inherited from an era where science already served profit.
This collective lie rests on a fundamental belief: that energy must come from sugar. Yet the human body was designed to run on fats. Fat is the original fuel of life. It provides stable, clean, sustainable combustion — while glucose causes spikes and brutal crashes, depleting reserves, oxidizing tissues, and triggering a silent inflammatory cascade.
Glucose is not an essential nutrient. It is a fast fuel that the body can use occasionally when available, but does not need to function. In ancient societies, these intakes occurred seasonally — through some fruits, honey, or certain roots — and allowed the body to temporarily build energy reserves in the form of fat, useful for periods of scarcity or winter. However, these natural intakes did not cause true glycemic spikes: wild fruits contained far less sugar than today’s, and their consumption was part of an active lifestyle, with a robust metabolism and perfectly healthy intestines. Among still-existing hunter-gatherer peoples, we observe the same constant: obesity and metabolic diseases are absent as long as their diet remains close to this ancestral model.
When it dominates chronically, glucose dysregulates metabolism, exhausts the hormonal system, overstimulates insulin, and triggers silent tissue inflammation. This rapid combustion activates constant oxidative stress, damaging cell membranes, accelerating aging, and promoting organ degeneration.
Modern diet has become a cycle of biochemical dependence: sugar raises blood glucose, insulin drops it, the brain demands another dose, and the cycle repeats. This mechanism, perfectly well known, has been exploited by the agri-food industries to create captive consumers, subjected to a permanent need for stimulation. This is no longer nutrition — this is conditioning.
Sugar has installed itself as a cultural, emotional, almost spiritual norm. It has slipped into our celebrations, our comforts, our rewards, our childhood memories. It has colonized our collective imagination, to the point of becoming an affective language. But behind this sweetness lies a raw truth: sugar possesses us. It saturates the nervous system, dysregulates neurotransmitters, weakens the will, and maintains a state of mental fog that prevents clarity and full awareness.
Thus, the great nutritional lie goes beyond the simple question of the body: it touches the sovereignty of the mind. A being dependent on sugar no longer thinks freely — it reacts, it compensates, it flees. Its inner fire is no longer directed; it is scattered in sparks of instant pleasure. This is what this dossier intends to reveal: the truth about this “fuel of life” that, in reality, consumes life itself. Understanding this lie is the first step toward reclaiming your body, your mind, and your inner freedom.
The Energy of Life: Why the Body Has Never Needed Sugar
Since the dawn of humanity, human beings have never depended on carbohydrates to live. For millennia, they nourished themselves on animals, organs, fats, eggs, as well as leaves, wild plants, mushrooms, berries, honey, and occasional roots, according to the seasons and the surrounding nature. Sugar, in its concentrated form, did not exist. Yet ancient peoples were strong, enduring, lucid, fertile, and free from the majority of diseases that ravage modern societies today.
The human body has no physiological need for sugar. Unlike fatty acids, amino acids, vitamins, or minerals, there is no essential carbohydrate for life. The brain itself, often called “glucose-dependent,” can function perfectly without a single molecule of dietary glucose.
When carbohydrate intake ceases, the liver activates two fundamental mechanisms: gluconeogenesis and ketogenesis. Gluconeogenesis allows the production of endogenous glucose from the amino acids in proteins and glycerol from fats. Ketogenesis, in turn, transforms fats into ketone bodies—a fuel of exceptional metabolic purity capable of powering the brain, muscles, and vital organs without causing inflammation or oxidative stress.
This mode of operation is not a metabolic plan B—it is plan A, the biological signature of our original adaptation. Dietary carbohydrates, known as exogenous, have never formed the basis of human metabolism: they intervened sporadically, notably through the seasonal consumption of fruits, honey, or tubers, or to enable the constitution of fat reserves intended to get through periods of cold and scarcity. In this, nature left nothing to chance. Primitive humans naturally alternated between phases rich in lipids and proteins and occasional phases of carbohydrate intake, which maintained their metabolic flexibility and physiological robustness.
These peoples illustrate a simple truth: the human being functions optimally when metabolically flexible—that is, capable of alternately using fats, proteins, or carbohydrates as needed. When it shifts into a prolonged mode dominated by exogenous carbohydrates, it loses this adaptive capacity and locks itself into an unstable metabolism, characterized by hormonal fluctuations, chronic inflammation, and increased cellular oxidation.
Glucose, by its rapid combustion, creates an unstable metabolism dominated by insulin, where cells spend their time extinguishing chemical fires. This process of repeated hyperglycemia causes hormonal imbalances, oxidative stress, accelerated glycation, and a weakening of the mitochondria. Conversely, ketosis restores the energetic stability of life. The body becomes sober, the mind clarifies, emotions pacify.
Glucose metabolism reproduces a state of stress and inner agitation: it activates the sympathetic nervous system and maintains emotional and hormonal instability. Conversely, fat metabolism, more stable, promotes parasympathetic relaxation, cellular repair, and mental clarity.
When the body functions primarily on fats, it no longer depends on exogenous carbohydrates and frees itself from chronic fatigue, cravings, and emotional fluctuations. It ceases to endure the hormonal roller coaster imposed by carbohydrates. In this regained stability, it becomes again what it has always been: a living temple, connected to its cellular intelligence, at peace in matter as in spirit.
The Straw Fire of Glucose
Glucose provides quick energy, but at the cost of overproducing free radicals in the mitochondria, which become depleted and lose efficiency. It is a brief flame that heats fast, but weakens the living organism over the long term. Every time it floods the blood, the body must stop everything to manage this metabolic emergency. Too much glucose is toxic: it corrodes cells, disrupts hormonal communication, and promotes the production of oxidizing species. The pancreas then triggers the secretion of insulin, the storage hormone, which orders cells to absorb glucose and transform it into fats. This mechanism is vital, but becomes destructive when repeated day after day.
Chronic exposure to insulin eventually dysregulates the entire hormonal system and creates a persistent inflammatory biological terrain. This insulin overload promotes insulin resistance, hypertension, metabolic disorders, and cardiovascular issues. The body exhausts itself trying to compensate for this chemical instability, and the organs gradually lose their capacity for self-regulation.
Starches as “slow sugars” — Really?
One of the greatest modern errors was calling starches “slow sugars.” This term gave the impression that they release their energy gradually and without danger. In reality, most so-called “complex” foods — breads, rice, pasta, breakfast cereals, and certain legumes — are rich in starch, a long chain of pure glucose whose digestibility varies according to its structure (rapidly digestible, slowly digestible, or resistant starch). Under the action of digestive enzymes, these highly digestible starches are transformed into glucose and raise blood sugar almost as quickly as a sweet dessert, especially when overcooked, ground, or processed.
The body then responds with an insulin surge. When these glycemic spikes and crashes repeat daily, they exhaust the organs, promote inflammation, and fuel oxidative stress. The blood becomes more viscous, microcirculation slows down, and fatigue sets in. What modern medicine calls “metabolic syndrome” corresponds, in Traditional Chinese Medicine, to a “collapse of Spleen energy”: the body’s transformative center that governs digestion, concentration, and emotional stability.
The Wisdom of Traditional Chinese Medicine
In Traditional Chinese Medicine, organs do not refer only to physical structures, but to energetic functions. The Spleen represents the center of transformation and distribution, the true generator of the body (Hou Tian Zhi Ben). It is what transforms food into Qi (vital energy) and Xue (Blood), then distributes them to all tissues. When it functions well, everything circulates harmoniously: digestion is fluid, energy is stable, and the mind is clear.
But when the Spleen is weakened, it can no longer properly transform food and fluids. This creates pathogenic dampness (Shi), which condenses into phlegm (Tan), weighing down the body, clouding perceptions, and disrupting the circulation of Qi and Blood. The ancients said: “Where the Earth is drowned, Heaven can no longer breathe.”
The sweet flavor (Gan) is associated with the Spleen: in small amounts it can harmonize it, but excess wounds it deeply. The ancient texts, such as the Huangdi Neijing (over 3,000 years old), express it thus: “The sweet flavor enters the Spleen; consumed in excess, it wounds it.” This observation, millennia old, concerned natural foods with moderate sugars—very different from today’s refined or concentrated carbohydrates. If natural sweetness could already wound the Spleen in excess, one can easily imagine the damage caused by modern sweetened products.
On the modern biological terrain, this corresponds to slowed digestion, water retention, unstable blood sugar, and a chronic inflammatory state. When the Spleen collapses, imbalances spread throughout the entire organism. It can no longer transform nor hold the Blood within the vessels, which disrupts circulation and promotes cardiovascular disorders.
The Heart, which governs the Blood and houses the Shen (spirit, consciousness), must then compensate, which can lead to hypertension or exhaustion of the heart muscle. At the same time, the Spleen can no longer contain the Liver, whose Yang rises: this causes irritability, internal tension, headaches, and hormonal imbalances. The Lungs receive dampness in the form of phlegm, hence the productive coughs, morning congestion, or puffy faces upon waking. Finally, the Kidneys must manage the accumulated excess water, which causes swelling, fatigue, and weakening of the Jing, the vital essence.
Thus, in the Chinese energetic view as in modern biology, carbohydrates weaken the body’s vital center. They make the Earth waver, overheat the Fire of the Heart, irritate the Wood of the Liver, and engorge the Water of the Kidneys. The body becomes heavy, the Blood thickens, the Shen becomes clouded, and the spirit loses its clarity. When the Spleen collapses, the entire balance of the living being becomes dysregulated.
This imbalance, when it settles over time, can lead to profound disorders of circulation and consciousness. Chinese medicine provides a striking reading of this.
Pedagogical Box — Stroke as Seen by Chinese Medicine
In Traditional Chinese Medicine, stroke is not seen as a sudden event, but as the culmination of a long-standing imbalance.
What modern medicine describes as hypertension, blood thickening, or vascular inflammation corresponds, in energetic language, to a weakening of the Spleen Qi, associated with Blood (Xue) stagnation and a progressive imbalance of the Heart and Liver.
Tradition teaches that it always takes at least two causes to fall ill, including one internal cause.
It is the internal biological terrain that determines where and how the disease will manifest.
As the ancient wisdom says: “The Wind enters where the door is open.”
This internal terrain often corresponds to an emotional, energetic, or spiritual imbalance — sadness, rumination, chronic stress, repressed anger — which gradually weakens the organs.
The Spleen, for example, becomes depleted under the weight of worry and excessive thinking, creating the ground for dampness and stagnation.
When an external cause is added — inappropriate diet, excess carbohydrates, toxins, or overwork — the door is open, and disease settles in.
The Spleen, weakened by excess carbohydrates — and therefore by too much sweet flavor and foods of cold and damp nature — can no longer transform fluids.
This stagnation creates pathogenic dampness (Shi), which condenses into phlegm (Tan) and thickens the Blood.
The Spleen no longer controls the Blood (Pi Bu Tong Xue), which prepares the ground for hypertension and circulatory disorders.
The Heart, in order to maintain circulation, exhausts itself pumping Blood that has become heavy and viscous.
Meanwhile, the Earth (Spleen), no longer able to contain the Wood (Liver), lets it run wild: the Liver becomes too strong, its Yang rises, and “the grandson attacks the grandmother” — this is the reversed cycle of the Five Elements.
It is then that the accumulated tension transforms into internal Wind (Nei Feng).
Depending on its intensity, this Wind can manifest as dizziness, tremors, spasms, or, in extreme cases, as a stroke (Zhong Feng).
Thus, what science describes as a vascular crisis is, in the energetic view, the result of an exhausted Earth (weakened Spleen), a disordered Heart Fire, and an excessive Liver Wood.
Modern excess carbohydrates are an integral part of this imbalance: they weaken the digestive fire, engorge the Earth, nourish dampness, and open the way for the rise of Wind.
TCM and modern biology converge:
when the Spleen collapses under excess sugar, the Blood thickens, the Heart exhausts itself, and the Liver runs wild.
The body then enters the storm: the Wind rises.
The Invisible Fire — Silent Inflammation
Beneath the apparent sweetness of sugar hides an invisible fire: that of glycation.
Every excess of glucose in the blood attaches to proteins and fats, forming rigid compounds called advanced glycation end products, or AGEs.
These molecules deform tissues, block enzymes, stiffen membranes, and transform the living into fixed matter.
It is a true internal caramelization: slow, insidious, but continuous.
The skin wrinkles, the arteries harden, the neurons lose their flexibility.
In people with diabetes, this process is amplified: their blood, saturated with glucose, becomes a true medium of permanent glycation.
Studies have shown that they have two to three times more circulating AGEs than non-diabetics (Uribarri et al., J Clin Endocrinol Metab, 2005).
These compounds accumulate in the vessels, skin, eyes, kidneys, and brain, causing rigidity, loss of elasticity, vascular lesions, and premature aging.
This silent fire creates massive oxidative stress that, over time, sustains fatigue, inflammation, and cellular degeneration.
It is often said that “diabetics age faster because they burn from the inside” — and this is scientifically accurate.
The paradox is that many vegan or vegetarian people, thinking they are adopting a healthy diet, suffer the same effects.
Not because they no longer consume meat, but because their modern diet is often too rich in starches, legumes, grains, and sweet fruits.
This dietary profile maintains elevated blood sugar and a state of chronic inflammation.
Recent work (Am J Clin Nutr, 2021 ; Nutrients, 2022) observed in vegans a higher fasting blood glucose than in omnivores, a higher rate of plasma AGEs, and greater glycation of skin collagen.
In other words: their skin and tissues age faster, despite their dietary discipline.
Glycation is not limited to blood circulation.
It also occurs in food, as soon as it is heated to high temperatures.
Grilled, fried, or caramelized foods already contain exogenous AGEs, which add to those the body produces.
A seared steak, a well-browned bread, or a crispy pastry bring thousands of AGE units per serving (Goldberg et al., J Am Diet Assoc, 2004).
The most toxic cocktail? The combination of sugar, starch, oxidized fats, and intense heat: a true glycation explosion.
Pedagogical Box — Starches: Understanding Their True Impact on Blood Sugar
Not all starches behave the same way
Contrary to what was long believed, starches are not “slow sugars.”
Depending on their structure and processing, they can raise blood sugar as quickly as pure glucose — or even faster.
This was demonstrated by the work of Jenkins et al. (1981) and Atkinson et al. (2008).
Jenkins and his colleagues observed that glycemic responses to starch-rich foods (bread, potatoes, rice) were often as high as those caused by pure glucose.
(Am J Clin Nutr, 1981)
🍽️ The Three Types of Starches
Type of Starch | Description | Effect on Blood Sugar | Examples |
Rapidly Digestible (RDS) | Quickly broken down into glucose in the small intestine | Strong, rapid blood sugar spike | Bread (white or whole wheat), white rice, potatoes, puffed cereals, cooked flour |
Slowly Digestible (SDS) | More gradual digestion, depends on matrix and cooking | Gentler but sustained rise | “Al dente” pasta, minimally processed grains, well-cooked legumes |
Resistant Starch (RS) | Not digested in the small intestine, ferments in the colon | Little to no immediate glycemic effect | Cooled rice or potatoes, green banana, natural soluble fibers |
Why Whole Wheat Bread Raises Blood Sugar as Much
Many believe whole wheat bread is better than white bread because it contains fiber.
But in reality, these fibers are ground up during milling, then heated during baking.
They lose their structure and no longer prevent the starch from becoming highly digestible.
Thus, according to the International Tables of Glycemic Index:
White bread: 75 ± 2 | Whole wheat bread: 74 ± 2 | Sugar (sucrose): 65 ± 4
(Atkinson et al., Am J Clin Nutr, 2008)
👉 In other words, a finely milled whole wheat bread raises blood sugar as quickly as white bread — and sometimes as much as a spoonful of sugar.
When Starch Is Not Digested… It Ferments
When a starch escapes digestion in the small intestine, it becomes what is called resistant starch.
This starch then reaches the colon, where it is fermented by intestinal bacteria.
This process generates gases (hydrogen, methane) as well as short-chain fatty acids (SCFAs): butyrate, acetate, and propionate.
These substances feed certain beneficial bacteria, strengthen the mucosal lining, and help maintain a balanced pH in the colon.
However, as Birt et al. (2013) explain, the effects of this fermentation depend on three key elements: the quality of the resistant starch, the amount consumed, and the state of the gut microbiota.
A good-quality resistant starch, present in moderate amounts and associated with a healthy microbiota, exerts a beneficial effect on the flora and promotes intestinal tissue regeneration.
Conversely, when the gut is already inflamed, permeable, or imbalanced, the fermentation of these starches can become excessive.
Repeated consumption of poorly digested starches then leads to fermentative overload, bloating, chronic irritation of the intestinal wall, and, over the long term, an increased risk of inflammation.
Thus, this process — beneficial when balanced — can become harmful when it occurs in a compromised intestinal environment.
“Resistant starch escapes digestion in the small intestine and is fermented in the colon.”
(Birt et al., Nutrients, 2013)
Key Takeaways
- There are no “slow sugars”: all digestible starches become pure glucose.
• The speed of transformation depends mainly on the degree of milling and cooking.
• A finely milled whole wheat bread raises blood sugar as fast as white bread.
• Only resistant starches, present in certain minimally processed foods, support the gut flora without raising blood sugar.
• Excess starch, especially refined, promotes fermentation, bloating, and intestinal inflammation.
How Sugar Alters the Mind, Will, and Discernment
Sugar does not merely cloud the body: it clouds consciousness. This is perhaps the greatest paradox of modern life: what we believe fuels our energy actually suffocates it. Blood sugar instability acts like a veil over mental clarity. After each glucose spike, the brain lights up, euphoric; then comes the crash: fatigue, confusion, irritability, the need to “have a little something.” This is the cycle of mental fog, of addiction disguised as sweetness.
On the biological terrain, these repeated blood sugar fluctuations disrupt neurotransmitters: dopamine, serotonin, acetylcholine. Sugar stimulates the dopaminergic system, activating the same reward circuit observed with certain drugs, then leaves behind a void we seek to fill. The brain learns to demand its glucose “hit.” Gradually, motivation collapses, concentration scatters, and discernment dulls. The mind races, but it no longer sees clearly.
Studies show that chronic hyperglycemia, even mild, alters brain connectivity: working memory declines, learning capacity slows, and the brain structures involved in decision-making weaken. In a study published in Diabetologia (Crane et al., 2013), subjects without diabetes but with blood glucose levels above normal already showed an increased risk of dementia. Other research (Kerti et al., 2013; Spinelli et al., 2019) confirmed that elevated blood sugar accelerates age-related cognitive decline, even in the absence of diabetes.
Glycation doesn’t just damage blood vessels: it also stiffens neurons and synapses. Advanced glycation end products (AGEs) bind to brain proteins, impairing nerve communication and promoting neuroinflammation via RAGE receptors. It is this low-grade inflammation that leads, slowly but surely, to mental fog, mental fatigue, and the loss of connection with oneself.
In traditional Chinese medicine, this mental opacity corresponds to an imbalance of the Heart and Spleen. The Heart houses the Shen (spirit, consciousness): when the blood becomes turbid or “sticky,” the Shen can no longer reside there fully; it wanders, homeless. The Spleen, responsible for transforming food into pure energy (Qi), saturated with sugars and dampness, collapses. Thought becomes confused, memory grows heavy, discernment dissolves. Spirit and matter no longer communicate.
Here, science meets energetics: stable blood sugar promotes mental and emotional clarity. The ketogenic diet, for example, has shown in several studies (Brietzke et al., 2018/2020; Grigolon et al., 2020) improvements in concentration, emotional stability, and neuroplasticity thanks to ketones as a clean fuel for the brain.
The sugar fog is therefore not a metaphor: it is a neurobiological and energetic reality. The more blood sugar fluctuates, the more consciousness becomes clouded. Conversely, when the body regains metabolic stability, the inner light rekindles. The gaze becomes clearer, thought more fluid, the heart more present. Returning to a moderate carbohydrate diet is about re-tuning body and mind; it is about stepping out of the sugar trance to reclaim the sovereignty of discernment.
Pedagogical Box — Sugar and the Brain: From Pleasure to Dependence
Glucose acts on the brain like a quick stimulant: it triggers a surge of energy, activates the dopaminergic reward circuit, and creates an illusion of power. But every spike is followed by a crash: fatigue, confusion, the need for a new “hit.”
Over time, this “surge–crash” loop creates a metabolic dependence: the brain demands sugar, the body obeys, but never regains stability.
The study by Kerti et al. (2013) showed that even in non-diabetic individuals, slightly elevated glucose levels were associated with decreased memory and altered hippocampal microstructure.
Glycemic dysregulation also disrupts insulin signaling in the brain, promotes neuroglial inflammation, and reduces synaptic plasticity (Spinelli et al., 2019).
Thus, carbohydrates are not neutral for the brain: they directly influence mood, memory, motivation, and ultimately, the capacity for discernment.
In Conclusion
Today, science is finally catching up with what the observation of the living has long shown: the human body was never designed to live under a constant glucose drip.
Science journalist Gary Taubes, in his book “Why We Get Fat” (Éditions Thierry Souccar, 2015), demonstrated that it is not fats that make us sick, but excess carbohydrates. By analyzing decades of research, he revealed that insulin, constantly stimulated by an overly sugary diet, keeps the body in a chronic state of storage, exhaustion, and inflammation.
Neurologist David Perlmutter, in his work “Grain Brain: The Surprising Truth About Wheat, Carbs, and Sugar” (Little, Brown and Company, 2013), showed that sugar inflames the brain, impairs memory, disrupts discernment, and accelerates cognitive degeneration. His observations align with those of numerous research teams (Crane et al., 2013; Marseglia et al., 2019; Uribarri et al., 2005), confirming that elevated blood sugar, even mildly, leads to a progressive loss of mental clarity and accelerated tissue aging.
These authors remind us that the body does not need dietary glucose to function. The liver naturally produces the glucose it needs via gluconeogenesis.
Dr. David Perlmutter emphasizes that ketone bodies derived from fats constitute a more stable and beneficial fuel for the brain. This return to original physiology restores stability, lucidity, and inner freedom.
Understanding this is reclaiming your biological sovereignty: recognizing that the energy of the living is that of coherence, not excitement. Where sugar agitates and exhausts, fats nourish and soothe.
Returning to a conscious diet, low in carbohydrates and rich in healthy fats, is not following a trend: it is returning to our primal nature, to the clarity of body and mind united.