Big Food’s Hard-to-Swallow Truth

There is something absurd about a food culture in which cooking dinner from basic ingredients can sound like an alternative health intervention. Our grandparents called it making tea. Now it competes with a supermarket aisle of products promising protein, energy, wellness and almost everything except a recognisable meal.

The most useful rebellion against that culture starts with reclaiming the kitchen. Before buying another expensive powder or surrendering to another branded diet, consider what happens when researchers replace ultra-processed products with ordinary food.

In a controlled trial at America’s National Institutes of Health, 20 adults lived at a research facility and spent two weeks eating each of two diets. One relied on ultra-processed foods; the other used minimally processed foods. Participants could eat as much or as little as they wanted.

On the ultra-processed diet, participants consumed roughly 500 extra calories a day and gained an average of 0.9 kilograms. On the minimally processed diet, they lost roughly the same amount. The same people, under controlled conditions, ate differently when the food changed.

That should put a dent in the smug assumption that every expanding waistline represents nothing more than defective character. Personal responsibility matters but so does recognising when the products filling your pantry make that responsibility harder to exercise.

A 2025 trial led by University College London took the question into everyday life. Researchers assigned 55 adults to receive two eight-week diets in turn, both designed around Britain’s official healthy-eating guidance. Fifty participants contributed to the main analysis.

Both diets produced weight loss. But average percentage weight loss was almost twice as large on the minimally processed diet: 2.06 percent compared with 1.05 percent. Participants were allowed to eat freely, without instructions to restrict their calorie intake. Even within an officially approved dietary framework, the degree of processing made a measurable difference.

A nutrition panel deserves attention, but it cannot tell the whole story of a diet. Neither can the cheerful promises on the front of a packet. A manufacturer’s interest in selling another serving is hardly identical to your interest in feeling satisfied and getting on with your day.

The practical response need not involve boutique groceries or a cupboard full of supplements. Eggs, vegetables, fruit, beans, plain yoghurt, fish and straightforward cuts of meat provide plenty of material for ordinary meals. Frozen vegetables and canned beans can save time. Cooking extra portions can make tomorrow’s lunch easier.

Nor should this become another excuse for officials to police the dinner table. Families need the knowledge, practical skills and purchasing power to feed themselves well. Cooking is a form of independence worth passing to children, alongside an ability to recognise when advertising is dressing convenience up as health.

Taking back control of our health can begin with what we put in the shopping basket and cook on the stove. A household that can prepare meals from basic ingredients knows what goes into its food and depends less on the companies selling it. That is practical independence, exercised every day at the dinner table.

“One reason to eat responsibly is to live free.”
– Wendell Berry