We Are the Victims of Junk Food Addiction

Since my forties, I’ve struggled with losing weight. I was never obese and maintained an average weight until midlife, when the pounds began to creep on. For years, I believed weight control was simply a matter of willpower, of watching what I ate and trying harder. I watched my friends fight the same battle, most of us losing more often than not.

 After being diagnosed with Alzheimer’s and committing myself to doing everything possible to delay its progression, experts strongly recommended the MIND diet. I know exactly what I should and shouldn’t eat. And yet, I still can’t resist ice cream and potato chips. In reality there are many other “junk foods” I struggle to say no to as well. Even knowing the consequences doesn’t stop me from buying them,  and eating them anyway.  Why is this?

 I watched my best friend literally kill herself by eating the foods she loved.  Why did she love food more than her own health?

 There are hundreds of “diets” designed to lose weight that don’t work because we don’t stay with them.  Why is that?  Is it just lack of self-discipline?  Or is it lack of understanding of just what is happening to in our body’s and brain’s inability to cope with today’s plethora of junk food and our societies infatuation with food.  We discuss it endlessly, idolize chefs, sing its praises constantly over the media, and load our supermarkets with an endless supply.

 Those of us living in the 21st century face eating challenges no generations before us has ever encountered. In just the last 50 years, much of the food supply has been stripped of its natural nutrition and transformed into something our bodies were never designed to process. At the same time, our most basic survival instincts, the natural desire for sugar, fat, and salt, have been deliberately engineered and exploited, turning once-protective cravings into drivers of chronic illness. This is not a failure of willpower; it is a biological mismatch with an industrial food system that is making us sick.  Almost without exception we have been unable to keep from becoming addicted to unhealthy processed food.  Yes, addicted. 

 Addiction is not a lack of willpower, it is a chronic brain condition marked by compulsion, loss of control, craving, and continued behavior despite harm. In this case, it arises when repeated exposure rewires the brain’s reward and self-control circuits, biasing decisions toward short-term relief over long-term well-being.

 Just as the tobacco companies created cigarettes to become addictive, the food industry engineered  processed food with concentrated sugar, fat, and salt hijacking the brain’s reward system in the same way addictive substances do. Dopamine spikes teach the brain to seek these foods repeatedly, while over time dulling pleasure and weakening impulse control. Cravings intensify, portions grow, and stopping becomes harder, even as health deteriorates. The result is not simple overeating, but compulsive consumption driven by brain circuitry that have been altered.

 I’ll admit it I used to believe that people who gained too much weight simply lacked willpower. I never considered overeating an addiction or recognized it as something that could physically alter the brain. Having grown up in an era when we were told cocaine wasn’t addictive and smoking was harmless, I can see how we’ve missed the addictiveness of junk food. 

 That is how addictions work. They don’t arrive with alarms blaring. They creep in quietly, reshaping behavior and biology long before we recognize the damage being done. By the time the health and mental consequences are impossible to ignore, the harm is already entrenched. Only then does the medical community rush to contain the fallout. Only then do the rest of us realize we’re trapped in an addiction, one that silently damages both brain and body.

 Nature Provided Humans with Food and Bodily Processes to Nurture Our Bodies

 Let’s start with what nature intended for humans.  We are part of the animal kingdom, but often forget that fact.  As animals we are born to a planet that can provide all the natural food needed to grow and sustain our bodies and brains.  We are omnivores.  Our bodies were designed to digest plants, meats, and minerals.  Humans initially had to survive in a world where food was scarce and energy had to be earned. To do that, our bodies rely on three elemental substances, sugar, fats, and salt, not as indulgences, but as biological necessities.

 Sugar, in the form of glucose, is the body’s most immediate fuel. Every heartbeat, every thought, every nerve signal depends on it. The brain, in particular, runs largely on glucose, and certain cells cannot function without it. In nature, sugar arrived slowly, bound within fruits, roots, and plants, released at a pace the body can manage and use efficiently.

 Fats serve a different, deeper purpose. They are the building blocks of cell membranes and the substance of the brain itself. Fats insulate nerves, form hormones that regulate stress, growth, and reproduction, and allow the body to absorb vital vitamins. They also provide long-lasting energy, sustaining the body when food is unavailable. In their natural state, fats signaled safety and survival.

 Salt, though needed in the smallest amount, is just as essential. Sodium enables electrical communication between cells, allowing muscles to contract, nerves to fire, and the heart to beat in rhythm. It maintains fluid balance and blood pressure. Without salt, life cannot be sustained for long.

 Together, sugar, fats, and salt once guided humans toward survival. The brain learned to seek them because they meant energy, stability, and life. The problem is not that the body needs these substances, it is that modern food concentrates them far beyond anything the human system evolved to handle. What were once rare and carefully regulated nutrients have become constant and excessive, pushing biology past its limits.

 At their core, sugar, fats, and salt are not enemies. They are signals of life. But when removed from whole foods and amplified without restraint, they cease to nourish and begin to overwhelm the very systems they were meant to support.

 Let’s take a look at each of these to understand how they become addictive and the damage that addiction causes.

 SUGAR

 Take a minute to think about the sweet foods you love to eat.  The ones that not only taste good but bring you fond memories.  Then look at the amount of sugar in those sweet foods. Where did that sugar come from?

 The sugar we use in processed foods comes from sugar cane or sugar beets.  The stalks are crushed to release juice, which is then heated, filtered evaporated and crystallized resulting in the elimination of fiber, vitamins and minerals. What remains is pure, fast-absorbing carbohydrate that are nothing like the sugars found in nature.

 Over time, the brain stops simply enjoying sugar and begins to crave it.  This addiction is beyond our will power.  Our brains have the wonderful ability to make repeated memories automatic.  For example, the roads you take to get to work become automatic, you no longer need a map.  This happens in our basal gangla in the center of our brain, relieving us of remembering individual steps to getting something done.  Our will power is generated in  our prefrontal cortex where we plan and make decisions.  Rationally we know eating sugar is bad for us, but when making the decision to eat sweets it is the basal gangla, the entrenched automatic behavior that wins.  Repeated exposure trains memory and emotion centers to link sweets with comfort, relief, and reward. The brain remembers where sugar was eaten, when it was eaten, and how it made you feel, looked, tasted and smelled. Sugar has used all our senses to create an addiction.  Everyday sights and situations, stress, celebrations, TV, packaging, or even the time of day, become triggers to our addiction. Eventually, the brain starts releasing dopamine before sugar is eaten, creating strong cravings even when the body has no need for energy.

 As sugar use continues, the brain adapts in a dangerous way. Dopamine receptors become less sensitive, meaning the same amount of sugar no longer feels satisfying. Normal foods lose their appeal, portions grow larger, and sweetness levels increase. Without sugar, something feels “off” or missing. This is tolerance, a key sign of addiction, where more is required just to feel normal.

 At the same time, sugar weakens the brain’s control center. The prefrontal cortex, responsible for self-control, judgment, and stopping impulses, becomes less effective with chronic high sugar intake. This makes resisting cravings harder and turning down sweets feel almost impossible. Under stress or fatigue, the brain’s brakes fail, and cravings take over automatically, not by choice.

 Sugar also traps the brain through stress. It briefly lowers stress hormones, creating a calming effect that teaches the brain to use sugar as emotional relief. But this relief doesn’t last. Blood sugar crashes trigger more stress, irritability, and fatigue, pushing the brain to demand sugar again. Over time, stress itself becomes a powerful trigger, locking the brain into a cycle where sugar is no longer about taste, but about coping.

 FATS

Fat does not addict the brain in the same sudden, explosive way that drugs do, but that makes its danger easier to overlook. High-fat foods quietly take advantage of the brain’s reward, learning, and stress systems, slowly reshaping behavior until eating becomes automatic and compulsive. What begins as comfort or enjoyment can turn into a powerful habit the brain struggles to control.

 When fatty foods are eaten, especially those engineered with salt or sugar, the brain’s reward center is activated. Dopamine is released, sending a message far more important than pleasure: this matters, do it again. Because fat is extremely calorie-dense, the brain’s ancient survival system treats it as a high-value resource. Processed fats are especially dangerous because they deliver a strong dopamine signal without triggering the body’s natural fullness cues. Over time, the brain starts favoring fat-rich foods and pushing healthier options aside.

 As this pattern repeats, the brain learns to crave fat, not just enjoy it. Emotional and memory centers begin linking fatty foods to comfort, safety, and relief from stress. The brain remembers when fat “worked” before and stores that solution for future use. Soon, seeing, smelling, or even thinking about fatty foods can spark cravings, even when the body isn’t hungry. The desire feels automatic because it is learned, not chosen.

 With continued exposure, the brain adapts by turning down its sensitivity to dopamine. Foods that once felt satisfying no longer deliver the same reward. Portions grow larger, flavors become richer, and eating becomes more frequent in an attempt to recapture the original feeling. This growing need for more is tolerance, a pattern seen in addiction, where the brain chases reward rather than nourishment.

 At the same time, fat weakens the brain’s ability to say “enough.” Diets high in processed and saturated fats interfere with the prefrontal cortex, the area responsible for self-control and good decision-making. As this control system weakens, impulses gain power. The urge to eat becomes faster and stronger, while the brain’s brakes fail to respond. Eating shifts from a thoughtful choice to a habit driven by instinct.

 Excess fat also disrupts the brain’s internal balance. Inflammation and insulin resistance interfere with hormones that signal fullness and regulate energy. The brain receives distorted messages, making it harder to feel satisfied and easier to keep eating. Hunger becomes confused with craving, and reward replaces real need as the driver of behavior.

 Stress further deepens the trap. When stress hormones rise, the brain searches for quick comfort, and fatty foods provide temporary relief. This teaches the brain to use fat as a coping tool. Over time, stress itself becomes a trigger, making fatty foods hardest to resist precisely when self-control is already weakened.

 The danger is greatest in modern processed fats. Natural fats in whole foods come packaged with fiber, protein, and nutrients that slow digestion and signal fullness. Processed fats are stripped down, refined, and engineered for texture and taste that override satiety. These foods deliver maximum reward with minimal stopping signals, reinforcing overeating again and again.

 The brain’s craving for fat is not a failure of character. It is the result of ancient survival wiring being exploited by modern food technology.

 What once kept humans alive now places the brain at risk, quietly, steadily, and powerfully.

 SALT

 Processed (refined) salt is extracted, purified, and concentrated to deliver almost pure sodium chloride.  Table salt comes from salt mines and evaporated seawater.  When it is processed it is stripped of trace minerals and ground very fine for quick absorption and usually contains anti-caking agents. This form of salt delivers a large, fast sodium dose to the bloodstream, something the human body rarely encountered historically.

 In natural foods, whole, unprocessed foods, sodium appears embedded within living structures, not as free crystals. It is found in vegetables (celery, beets, carrots). Meat, fish, dairy, eggs, nuts, seeds, sea vegetables. Sodium is bound within cells and tissues, comes with potassium, magnesium, calcium, delivered slowly during digestion, balanced by fiber, water, and protein.  This slows absorption and helps the body regulate fluid balance and blood pressure.

 Your brain evolved to detect and seek sodium because it was once scarce. Natural foods provided small, regulated amounts.  Processed salt delivers concentrated hits, overwhelming feedback systems.  This can drive cravings, habitual overuse and blunted taste sensitivity

 Salt becomes dangerous not because our bodies need it, but because our brains are wired to reward it. For most of human history, sodium was scarce, so the brain evolved powerful survival circuits that release dopamine when salt is consumed. Today, those same circuits are relentlessly overstimulated by refined, concentrated salt found in processed foods.

 High salt intake further disrupts hydration and blood pressure, creating fatigue and discomfort that the brain often misreads as hunger. The result is a self-reinforcing cycle of thirst, craving, and overconsumption.

Most importantly, salt rarely acts alone. When combined with fat, sugar, and crunch, chips, fries, cheese snacks, the dopamine response is amplified far beyond what salt could produce by itself. These combinations are designed to drive compulsion, not choice.

 With repeated exposure, the brain learns to crave salt even when the body no longer needs it. Taste sensitivity dulls, natural foods begin to taste bland, and heavily salted foods become the norm. Salt also briefly reduces stress signals, training the brain to use it as a coping mechanism rather than nourishment.

 This matters for brain health. Chronic high salt intake is linked to vascular damage, impaired blood flow, inflammation, and changes in the gut, brain axis, all of which increase dementia risk. When salt is paired with fat and sugar, as it often is, the dopamine surge is amplified, reinforcing compulsive eating and accelerating metabolic and cognitive decline.

Understand Your Addiction, Then Challenge It

 This is not a willpower problem. It is an ancient survival system being exploited, and the long-term cost may be the health of the brain itself.

 The danger we face today is not indulgence, but exposure, constant, engineered exposure to sugar, fat, and salt at levels our brains were never designed to manage. These substances no longer simply fuel the body; they reshape the brain, weaken self-control, inflame blood vessels, and quietly erode cognitive health. Left unchecked, they increase the risk not only of obesity, diabetes, and heart disease, but of dementia itself. This is not a distant threat or a problem for future generations, it is happening now, meal by meal, habit by habit. The warning signs are clear. To ignore them is to surrender brain health to an industry that profits from addiction. The choice to heed this danger may be one of the most important acts of self-preservation we can make.

Once you have identified what junk food you crave, you can retrain your brain to stop the addiction. See the article, Retrain Your Brain to Stop Junk Food Addiction.