[Evgeny]

The main benefit of low-carb diets for weight loss is that they spontaneously reduce calorie intake by cutting out whole groups of foods (by looking at studies it's been shown that any diet that restricts food choices like this will tend to induce weight loss but is usually unsustainable)

Another benefit is that the low-carb diets provide better satiety. In studies, if people were advised to eat ad libitum, those who had to choose from low-carb foods eventually consumed less calories than those, who could choose from "regular" food.