Ultra-processed foods are becoming increasingly prevalent in our diets, yet they may have serious detrimental effects on our health. In this article, we will examine what constitutes ultra-processed food, the evidence that it can cause overeating and addiction, and why it may be harmful for our health.
What is Ultra-Processed Food?
Ultra-processed foods are industrially formulated mixtures of ingredients that are designed to create appetizing, convenient, affordable and highly profitable food products. They typically contain little whole food and high amounts of salt, sugar, oils and fats. Examples include mass-produced breads, desserts, ready meals, processed meats and snack foods.In comparison, minimally processed foods like fresh fruits, vegetables, grains and meats contain few additives. Home cooked meals also usually fall into the unprocessed category. However, even a home-cooked lasagna can become “ultra-processed” if you use ready-made pasta sheets, jar sauce, packaged cheese and cured meats.
The Problems with Ultra-Processed FoodOvereating
Several studies have demonstrated that ultra-processed foods can lead to overeating and weight gain. In one trial, healthy volunteers lived in a clinical research unit for a month and were randomly assigned to eat a diet of either ultra-processed or unprocessed meals. Both diets had the same amounts of calories, carbs, fat, sugar and fiber. Yet, those eating the ultra-processed meals ate about 500 more calories per day and gained weight (2).The researchers speculated this was because the ultra-processed foods were specifically engineered to be hyper-palatable, with perfectly combined fat, salt and sugar ratios. This overwhelmed the body’s natural fullness signals, leading people to overconsume.
Addiction
The addictive nature of junk foods is now being recognized, especially in susceptible individuals. Animal studies show that ultra-processed foods rich in fat and sugar can trigger reward and pleasure centers in the brain, and override signals of fullness (3). One study found Oreos to be as addictive as cocaine or morphine in lab ratsIn humans, brain imaging studies also reveal changes in brain activity similar to those seen in drug addiction. And surveys link symptoms of food addiction particularly to processed foods high in refined carbs and fat.So while foods are not addictive in the exact same way as drugs, highly processed junk foods do seem to have an addiction potential for some people.
Health Risks
Study after study has linked ultra-processed food consumption to poor health outcomes. A few major findings:Increased risk of obesity, heart disease, high blood pressure and cancer Higher rates of depression and anxiety Accelerated cognitive decline and dementia Earlier death
And this goes beyond just the effects of added salt, sugar and fat. The processing itself destroys the natural food matrix and may generate compounds that disrupt metabolism and gut health (12).Essentially, synergy is lost when you isolate ingredients and recombine them during processing. Our bodies don’t handle ultra-processed foods the same way as the original whole food.
Why Are Ultra-Processed Foods Harmful?
There are a few leading theories as to why ultra-processed foods cause harm:
Hyper-palatability promotes overeating. Lack of fiber and protein fails to induce satiety.
Rapid absorption of carbs and fat spikes blood sugar and energy intake.
Toxic byproducts from processing may cause systemic inflammation.
Alteration of gut bacteria linked to impaired metabolism and immunity.
Tackling Processed Food Addiction
For those struggling with compulsive overeating of processed junk foods, the following tips may help regain control:Gradually cut back on ultra-processed foods rather than going cold turkey. This allows time for your brain chemistry to recalibrate.