Dr. Emily Cooper says diets may actually cause you to gain weight, not lose it.
Ninety percent of the time, after losing weight on a diet, you regain that weight plus more. In fact, many people regain 22 percent more than their pre-diet weight.
By depriving your body of foods you enjoy, the body eventually senses something is missing and the system that regulates your metabolism goes into an energy conservation state. In other words, your body increases fat as a protective measure.
Chronic dieting, especially if you have the genetics for weight problems, can trigger a weight defense system that tells the brain you are starving.
Cooper said the best defense against weight gain is to eat regularly rather than to deprive yourself.