When it comes to diets, a very low calorie diet (VLCD) is ideal for rapid weight loss. However, it is also important to have some variety in your vocabulary when talking about this type of diet. So, here are some synonyms for VLCD: ultra-low calorie diet, extreme low calorie diet, restricted calorie diet, severe calorie restriction, and minimal calorie diet. All of these terms refer to a dietary plan that restricts the intake of calories while ensuring that the body gets the necessary nutrients. It is important to consult with a doctor before starting a VLCD, as it may not be for everyone. So, choose your words wisely when describing this type of weight loss program.