It is almost impossible to buy unprocessed food these days. The ordinary supermarket loaf is a travesty of real bread stuffed with additives to make it stay soft, not go mouldy, last a long time and rise in a much shorter time than real bread, and the final insult, steam cooked.
Most people then put some processed spread on it made from different oils with additives to make it yellow and spreadable.
It is easy to say that the problem is all poor people feeding their families takeaways. It isn't, it includes the Waitrose shopper buying modern processed bread and margarine. It is impossible not to eat food that does not contain UPFs. Trying to avoid them is almost impossible.
Venison gets mentioned. Buy venison burgers from a butcher and they are 100% meat. Buy them from Tesco and the ingredients list says: Venison (91%), Dried Potato, Rice Flour, Water, Cornflour, Salt, Garlic Powder, Onion Powder, Spices, Tomato Powder, Preservative (Sodium Metabisulphite), Sage. Better than most
Buy a Tesco Smashburger and it contans 86%–94% beef, salt, cracked black pepper, onion powder, and sugar, rice flour is dried potato, maize starch or wheat flour, sodium metabisulphite, yeast extract.
The beef may be British but we have no informaation on how it was reared and what antibiotics it may have been given and whether the food it was fed meant it suffered from chronic inflammation.
I think most obesity is the result of malnutrition, not just eating too much. Malnutrition that cannot be avoided because the products that cause this malnutrition are pervasive in the food chain from the cheapest to most expensive food.
All these products have been tested for safety etc as individual substances. But the interactions between them when 5 or 10 turn up in the same product, are impossible to monitor.
I think these products interfere with the working of the body by affecting the microbiome and balance of different bacteria present.