I can definitely see that the production team would want to have dramatic, positive results to publicise. I think too, that if the family had done a low
er carb diet, that it wouldn't make such an impact on the viewers who watched the show. It's quite a powerful message, to see them taking a stand for their health and chucking out the fizzy drinks and cereals. That's probably a motivator for many viewers.
If someone goes to
www.dietdoctor.com/lchf and studies the photos on that page, the photos shown, are of real food. Meat, fish, butter, olive oil, eggs, milk, lettuce, avocado etc. Not processed food.
Not sodas, candy, sweeteners, sugar free jam, bread, rice, pasta, fish fingers, Quorn, 0% fat yogurt, sugar free jelly etc etc etc.
That's part of the whole process. Swapping the standard Western diet of heavily processed food, for real food.
If eating real food is daunting, it shows how divorced we are from the roots (literally) of the food that we eat.
There are probably people readng this post, who've never come across a cow in real life. Who haven't ever visited a farm, let alone a food manufacturing plant. That's not their fault, it just shows how industrialised our world is and how processed our food is.
It's all packaged with nice photos of farm animals, milk churns, green fields, Italian kitchens etc but that frozen Margherita pizza probably has ingredients from 60 countries and has never been anywhere near Italy. Fifty years ago, people in the UK didn't have freezers and microwaves at home and there wasn't a single McDonald's.