Are very Low-Calorie Diets safe?
Very low-calorie diets are not safe for everyone. If your BMI is greater than 30, then very low-calorie diets are generally safe when used under proper medical supervision.
For people who are overweight but not obese (BMI of 25-30), very low-calorie diets should be prohibited for those who have weight-related medical problems and are under medical supervision. Moreover, very low-calorie-diets are not recommended for pregnant or breastfeeding women and are not appropriate for children or teens except in specialized treatment programs.
They may also not be suitable for people over 50 years old, due to the potential need for medications for pre-existing conditions, as well as the possibility of potential side effects.