advice used to focus on fat, sugar and salt.
Recent research has shifted attention to how heavily a food is .
Ultra- products are made largely from industrial rather than whole foods.
They are designed to be cheap, stable on the shelf and very easy to eat quickly.
In controlled trials, people eating such diets consumed several hundred extra calories a day.
They ate faster and felt full later, even when the were matched.
Critics of the category argue that it is too broad to guide anyone.
Wholemeal bread and a sugary drink both fall inside it.
Supporters reply that the pattern of harm is consistent across countries.
Policy so far has been mild: , advertising limits and school rules.
Price remains the strongest force, and food is cheap per calorie.
Telling a family on a low income to cook from scratch ignores time and .
Any serious answer has to make the better option the easier one.