In earlier times we were told that calorie restriction is the only way to weight loss. While any significant calorie restriction will result in weight loss, that calorie restriction has to be sustainable and healthy in the long run.
Consider the fact that two apples have the same number of calories as a hostess Twinkie or that a slice of Lemon Meringue pie has the same amount of calories as a veggie stir fry with brown rice.
However anyone will be able to tell you which two items from among the two sets of options is better for you.
For one, the hostess Twinkie and the lemon meringue pie are high in processed ingredients such as refined flour & refined sugar, have very significant proportions of fat and also have additives, artificial colors preservatives and so on.
On the other hand, the stir fry and the apple are low in fat and sugar, and offer significant amounts of essential nutrients that the body needs to function optimally.
Secondly, the veggies and fruit options are high in fiber, water and less calorie dense, so they fill you up more while eating less. They also keep you feeling full for longer.