*vegasmags', the person you heard on R4, was, I think, the American journalist, Michael Pollan, he came up with the mantra that has informed my eating for years 'Eat well, not too much, most of it plants' followed by 'If its made from a plant, eat it. If it is made in a plant, don't'.
He once asked his readers in the USA to suggest other eating rules, which he published in a book called (surprise, surprise) Food Rules. Rules it includes are: ' Do not get your fuel from the same place as your car', 'It is not a food if it is called by the same name in every language' (Big Mac, Pringles, KFC); 'Avoid foods described as 'Lite', 'Low fat' or other similar phrases'; 'Avoid foods containing ingredients you cannot buy in a supermarket'
I think all the government warnings and medical doom merchants far from doing anything to improve our health are actually damaging it. At one end we get people frantically reading lists of ingredients, nutrient analyses and traffic lights and at the other end those who just shove anything in their mouth if it is greasy, sweet and comes ready to eat.
We are losing the ability to enjoy good food, well-cooked, to take sensual pleasure in eating food and sampling flavours, or to appreciate the taste and flavour of good quality food (Rule: 'Pay more, eat less) there is forever that miasma being held over our heads, of is it 'good' for us, is it 'healthy', is it a 'forbidden' or 'naughty food? Whether it is enjoyable, or a pleasure to eat never enters the government/medicos minds.
If the government et al want us to eat well, they should celebrate the joys and pleasures of good quality food, the glories in seasonal eating, the excitement of eating the first fresh-from-the-farm asparagus, of blackberries picked from a hedgerow on a country walk, or even on waste site in a city, of eating something you have grown yourself, like cress grown on paper towel. Sing the praises of food, not its nutritional content.