Some would label the cabbage soup diet as dangerous.  Any diet that involves eating less than 1000 calories isn’t a diet…it’s starvation.  They would tell you that the reason you’re losing weight is because you’re not eating enough food.  The end result is that your body will go into starvation mode.  The body will begin to rapidly consume fat in an effort to maintain bodily functions and stay alive.  Once you end the diet, your body will attempt to store excess as a fail-safe in case it is forced back into starvation mode again.  This makes it very difficult to keep the lost weight off permanently.  So does the cabbage soup diet work?  Yes.  And no