Weight Watchers, Jenny Craig, Nutri System. These are diets that claim to help you lose weight, and while an overweight individual starting on these meal plans may experience some initial change in pounds, the number on the scale does not always indicate a healthy lifestyle or physicality. The following article at the end of this post tells it all: “Dieting May Cause The Brain To Eat Itself”. Think about it. Is it worth causing internal damage to your body just to lose a few pounds? The better option is to not even worry about the number on the scale. Fuel your body appropriately, exercise healthfully, practice positive self talk, and get adequate rest. Those steps will bring you closer to true health–moreso than a restrictive and crazy diet.
http://blogs.smithsonianmag.com/science/2011/08/dieting-may-cause-the-brain-to-eat-itself/