Have you ever wondered why you can’t stop thinking about that restaurant meal hours after you’ve left? Why you crave certain dishes long after you’ve satisfied your hunger? The answer lies in the strategic use of five key ingredients that restaurants employ to keep customers coming back for more.
These components aren’t just about taste. They’re carefully chosen and precisely balanced to trigger powerful responses in your brain, creating what food scientists call the “bliss point.” Understanding what makes restaurant food so irresistible isn’t about blame or shame – it’s about knowledge and awareness in our food choices.
The Ultimate Flavor Amplifier: Monosodium Glutamate (MSG)
MSG appears in the kitchens of major chicken chains, including KFC, Chick-fil-A, and Popeyes, where it’s used as a flavor enhancer to produce an even bolder umami taste. This flavor enhancer is added to savory foods to make them have that ultra-addictive flavor, commonly used in restaurant foods to enhance the addictive quality of the food’s flavors.
Monosodium glutamate, or MSG, is a flavoring agent – a form of concentrated salt added to foods to enhance the flavor that is present in a variety of fast food and convenience food items. MSG is a commonly used ingredient in fast food chains to enhance the umami flavor, known for its savory taste, and is added to fast food to amplify the natural flavors of the ingredients, resulting in a more robust taste experience.
What makes MSG particularly concerning is how it affects your eating behavior. You’ve probably experienced the effects of MSG when you’ve eaten flavored potato chips and found yourself eating chip, after chip, after chip. There might be a reason why you feel a little out of control when eating at restaurants that use MSG, as many people have a sensitivity to it and can have reactions.
The Sweet Trap: High Fructose Corn Syrup
The constant consumption of foods enriched with high-fructose corn syrup exerts a direct effect on the dopaminergic mesolimbic system, stimulating the synthesis of dopamine causing a sensation of pleasure, with the sweet taste of carbohydrates such as high-fructose corn syrup having a particular stimulus that can lead to selecting certain foods repetitively until they develop an addiction.
The consumption of high fructose corn syrup increased over 1000% between 1970 and 1990, far exceeding the changes in intake of any other food or food group, and now represents over 40% of caloric sweeteners added to foods and beverages. High-fructose corn syrup is found in a wide range of foods and beverages, including fruit juice, soda, cereal, bread, yogurt, ketchup and mayonnaise, with Americans consuming 60 pounds of the sweetener per person every year.
Research has revealed disturbing parallels between high fructose corn syrup and addictive substances. New research shows that high-fructose corn syrup can cause behavioral reactions in rats similar to those produced by drugs of abuse such as cocaine, suggesting food addiction could explain, at least partly, the current global obesity epidemic. Studies show that high fructose corn syrup consumption induces glucose dysregulation and reduces evoked dopamine release in the brain, contributing to metabolic disorder and altered dopamine function independent of weight gain.
The Stealth Destroyer: Trans Fats and Partially Hydrogenated Oils
Partially hydrogenated fats have displaced natural solid fats and liquid oils in many areas, most notably in the fast food, snack food, fried food, and baked goods industries, with up to 45% of the total fat in those foods containing human-made trans fats formed by partially hydrogenating plant fats.
The widespread use of hydrogenated oils in prepackaged foods and for cooking in restaurants, particularly fast food restaurants, made Canadians have one of the highest dietary intakes of trans fats in the world. Restaurants may prefer to fry with partially or fully saturated fats because these fats need not be changed as frequently, and saturated oils in foods contribute to a desirably soft texture, volume, aeration, and feel at room temperature.
The addictive potential of trans fats extends beyond taste preferences. Research shows that trans fat consumption increases the frequency of amphetamine self-administration and is associated with reinforcement and withdrawal signs, with findings pointing to a harmful influence of trans fats on drug addiction and craving symptoms. Trans fats, a form of processed hydrogenated cooking oil, have been identified as one of the most dangerous food additives, raising both bad LDL cholesterol and reducing healthy HDL cholesterol, with research showing a possible link to reduced insulin sensitivity.
The Dopamine Dealers: Artificial and Natural Flavors
Artificial sweeteners are designed to reward our brain with pleasure and release dopamine by pleasing our taste buds, and while food addiction is a real thing even without artificial flavors, they only increase the risk of developing addiction. When our taste receptors get activated through artificial food flavoring, the reward centre of our brain is activated and hormones like dopamine are released, but when an artificial flavor mimics a nutrient from nature, our brain thinks we’re getting those nutrients, then when we don’t, our brain will urge us to eat another, and another.
Hyperpalatable foods contain combinations of fat, sugar, salt, and other flavors that stimulate the reward centers in the brain, with flavors often amplified compared to foods found in nature. Manufacturers of ultra-processed foods often seek to find the most alluring combination of salt, sugar, and fat in their products, reaching what’s known as “the bliss point,” a term coined by American market researcher and food scientist Howard Moskowitz in the 1990s.
The manipulation goes far deeper than most people realize. Food companies not only research taste, but also consumers’ responses to color, smell, and “mouth feel” of products, with food scientists sometimes tweaking specific ingredients and even grinding salt finer to help flavor hit taste buds faster for an “improved flavor burst.” The highly engineered nature of flavor profiles is designed to maximize dopamine release, with the release of dopamine creating a craving for more to recapture that feeling, essentially tricking your brain into believing that it needs more of this highly rewarding substance.
The Perfect Storm: Salt, Sugar, and Fat Trinity
Fat, sugar, and salt make up the trinity of junk and fast food ingredients, and just like sugar and fat, salt stimulates the pleasure center in the brain, releasing chemicals that make us feel good. These three ingredients are known as trigger substances meaning when all three are combined into food, they keep you coming back for more until your body becomes addicted to a food, such as fast food.
Fast foods are often served up with a side of additives, excessive fat, refined carbs, sugars, and sodium – all ingredients that trigger responses in our brain, leading to cravings and even compulsive eating, making them highly addictive. The bliss point triggers dopamine to spike, then crash, bringing about good feelings, then bad feelings, and generates the craving to feel good once more.
Research reveals why this combination is so powerful. Animal studies have shown that rats show signs of being addicted when given a high-salt diet, demonstrating brain changes similar to those seen with drug use, and the lab animals also showed signs of being psychologically addicted. Studies observe that the combination of sugar and fat is more commonly associated with addictive symptoms than sugar alone, with the combination of fat and sugar making junk foods addicting and easy to overconsume.
