Or we could get some facts...
http://www.webmd.com/diet/low-calorie-diets#1-2
				
					Are Very Low-Calorie Diets Safe?
				
				Very low-calorie diets are not OK for everyone. Talk to your doctor to see if this kind of diet is appropriate for you.
					
						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 27-30), very low-calorie diets should be reserved for those who have weight-related medical problems and are under medical supervision.
				Very low-calorie-diets are not recommended for 
pregnant or 
breastfeeding women, and are not appropriate for children or 
teensexcept in specialized treatment programs. They also may not be OK for people over age 50, either, depending on the potential need for 
medications for pre-existing conditions, as well as the possibility of side effects.
					What Are the Side Effects of Very Low-Calorie Diets?
				
				People on a very low-calorie diet for 4 to 16 weeks report minor side effects such as 
fatigue, 
constipation, 
nausea, and 
diarrhea. These conditions usually improve within a few weeks and rarely prevent people from completing the program.
Gallstones are the most common serious side effect of very low-calorie diets. Gallstones are more common during 
rapid weight loss. When the body experiences a calorie deficit, it starts to break down fat for energy. The 
liver then secretes more 
cholesterol and when combined with bile, can form gallstones.