[hristov]

They did a crossover study on the two diets. Ie the high protein diet and the high fiber diet. They did absolutely no crossover or no control on the headline thesis of their paper. The headline being that big breakfast alters appetite or is somehow good for weight-loss.

This study shows or proves absolutely nothing about advantages or disadvantages of big breakfast or that a big breakfast makes any difference whatsoever.

It only shows that if you are going to have a big breakfast as part of calorie limited diet if you choose a diet with high protein you will lose weight slightly faster but will have slightly worse gut health than if you chose a diet with high fructose.