Ultra-processed food is the most heavily processed category in the food supply. It is engineered to sell, not to nourish. Much of it is built from the sweeteners and oils processed out of the corn surplus. Eating it degrades the gut microbiome.
Not all food is equally processed. The most processed kind contributes directly to gut dysfunction (a gut that does not work right). Ultra-processing is not about nutrition. Its goal is branded, convenient, durable, hyperpalatable products that sell.
Why does the food industry make ultra-processed food?
The food industry has a fiduciary duty to produce profit for its shareholders. It is meeting that duty. The downstream cost to public health is not on its balance sheet. And that cost is bankrupting most westernized societies.
America does not have a healthcare system so much as a sick-maintenance arrangement. Weight loss is a primary concern for a large share of people. The industry set up to address it has not produced a solution — which is no surprise, since the same food supply creates the demand.
Monocropping and the surplus
By 1967 the American corn farm was growing nearly three times as much corn as thirty years earlier. That mono-cropped surplus was fed to livestock to increase production. It was also processed into the sweeteners and oils that now saturate the food supply.
Megafarms increasingly rely on monocropping (growing one crop over and over). This strips soil of helpful microelements in order to maximize yield. Food grown in depleted soil is not nutritionally equal to what came before it. And the difference does not appear on any label.
How do ultra-processed foods affect your gut?
Eating processed food degrades the intrinsic gut microbiome (the microbes that live in your gut). That depletion is associated with the rising prevalence of complex conditions — allergies, autoimmune disease, anxiety and mood disorders. Their rates have moved in step with the industrialization of the food supply.
Titanium dioxide and the additives nobody consented to
Titanium dioxide nanoparticles, 28 to 1158 nm, are a common whitening agent. They were long treated as inert and classified as an excipient — a pharmacologically inactive substance. But tiny nanoparticles do not act the same as bulk material. The idea that they are inert has not aged well. They are in products most people would not think of as holding an engineered nanomaterial.
Vending machines in elementary schools
Vending machines stocking soda are common in schools, particularly elementary schools. That is hard to defend on any health ground. Sodas are made largely with high-fructose corn syrup. They deliver it in liquid form to children whose metabolic trajectory is being set.
Weight-loss programs now market to children. The attention to the problem is welcome. But a commercial weight program is the vehicle. That says something about how far the underlying food supply has gone unaddressed.
What went wrong
A research investment in the 1960s led to selling more sugar. It also, plausibly, contributed to sickening a large share of the population. Industry-funded science shaped dietary guidance for decades. And the guidance shaped what a generation ate.
Malnutrition of excess
The United States has a malnutrition crisis that is not caused by too little food. People once died of famine; they now die of excess. It is still malnutrition — calories are abundant and the micronutrients that come with real food are not.
For contrast: prehistoric humans ate bone marrow 400,000 years ago. Marrow, together with cranial contents (what is inside the skull), was among the few reliably nutrient-dense foods available. The human species is not adapted to what replaced them.
Frequently asked questions
Are ultra-processed foods bad for you?
Yes. Ultra-processing exists to make branded, convenient, durable, hyperpalatable products that sell, not to nourish you. Eating them degrades the gut microbiome. That depletion is associated with the rise in allergies, autoimmune disease, anxiety and mood disorders. That rise has tracked the industrialization of the food supply. These foods also leave you overfed on calories and short on the micronutrients that come with real food.
Is soda an ultra-processed food?
Yes. Soda is made largely with high-fructose corn syrup, one of the sweeteners processed out of the corn surplus. It delivers that sugar in liquid form. It is still stocked in school vending machines, including in elementary schools. It reaches children at the age when their metabolic trajectory is being set. That is hard to defend on any health ground.
Where do the ingredients in ultra-processed food come from?
Much of it starts on the corn farm. By 1967 American farms were growing nearly three times as much corn as thirty years earlier. That mono-cropped surplus was fed to livestock. It was also processed into the sweeteners and oils that now saturate the food supply. Monocropping also depletes the soil of beneficial microelements. So food grown on it is not nutritionally equal to what came before.
Can you eat too much and still be malnourished?
Yes. The United States has a malnutrition crisis that is not caused by a shortage of food. People once died of famine; now they die of excess. Calories are abundant, but the micronutrients that come with real food are not. That is because ultra-processed products and food grown in depleted soil do not carry them. It is still malnutrition, just of a different kind.
Related reading
Sources
- Hall KD, Ayuketah A, Brychta R, et al. Ultra-processed diets cause excess calorie intake and weight gain: an inpatient randomized controlled trial of ad libitum food intake. Cell Metabolism. 2019. PMID 31105044
- Lane MM, Gamage E, Du S, et al. Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses. BMJ. 2024. PMID 38418082
Medically reviewed by Dr. Gurpreet Singh Padda, MD, MBA, MHP
Interventional pain physician, addiction medicine specialist and obesity medicine diplomate.
Licensed in Missouri and Illinois.
Last reviewed August 25, 2026
