As long as you don't go overboard on your calorie intake, it is possible to survive on a diet consisting only of low-nutrient-density foods.
But if you want to improve your health in other ways other merely losing weight, this is not the approach for you.
Instead, it is advised that you fuel your weight reduction efforts by consuming meals rich in vitamins, minerals, high-quality protein, healthy fats, and fiber.
Consuming fewer calories without sacrificing entire meals or snacks is possible when you focus on low-calorie options.
A low-calorie diet works by causing a calorie deficit, which forces the body to burn fat for fuel.
Somewhere between 1,000 and 1,500 calories per day is considered "low-calorie," however this range is flexible.
Many obesity organizations and recommendations suggest a deficit of 500-750 calories per day if this diet is being followed for weight reduction
If your daily calorie intake averages 2,000, your low-calorie diet should consist of 1,250-1,500 calories per day to promote weight reduction.