Very low calorie diets - NHS
www.nhs.uk › very-low-calorie-dietsVery low calorie diets. A very low calorie diet is a clinically supervised diet plan that involves eating about 800 calories a day or fewer. They are sometimes considered for obese and severely obese people who are managing diabetes, going to have surgery or preparing for fertility treatment. The diet usually involves replacing normal food with low-calorie shakes, soups, bars, or porridge containing milk.