Cutting out fats and going for "low calorie" foods, mainly full of carbs, albeit not as many calories.

You just digest them quicker, then get more hungry. That method can work, but it requires more will power, and the kind of people that buy "healthy foods" are the kind of people that aren't trying to diet on willpower.

Fats and proteins keep you feeling fuller for longer, carb-based diets were propangadized and popularized by the grains industries.

Other than that its pretty much up to calories in - calories out, and staying active so you dont shut down and go into starvation mode. The rest is all mind games to make it easier on you without sapping your will power. And "super foods" dont exist, just eat a multivitamin.