Weight loss

Most people can lose weight if they limit calories and boost their physical activity. You lose weight when the calories you eat or drink is less than what you need for daily activities and exercise. To lose 1 to 1.5 pounds (0.5 to 0.7 kilograms) a week, you generally need to eat 500 to 750 fewer calories each day.

Low-carb diets, especially very low-carb diets, may lead to greater short-term weight loss than low-fat diets. But most studies have found that at 12 or 24 months, the benefits of a low-carb diet aren't very large or can't be kept up.

Cutting calories and carbs may not be the only reason low-carb diets can lead to weight loss. Some studies show that people may lose weight because the extra protein and fat helps them feel full longer. Feeling full longer helps you eat less over time.