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"Diet" products are making you fat, says a new study from the University of Georgia, which found that "diet" snacks heavy in sugar may lead to unwanted pounds.Rats fed menus full of high sugar, low fat foods gained weight compared to rats fed balanced, healthy diets. Subjects on high-sugar diets also developed brain inflammation and liver damage."Most so-called diet products containing low or no fat have an increased amount of sugar and are camouflaged under fancy names, giving the impression that they are healthy," said University of Georgia associate professor Krzysztof Czaja. Scientists monitored the subjects' body weight, caloric intake, body composition and fecal samples in three groups of rats. One group ate a diet high in fat and sugar, another ate a low fat, high sugar diet and the third ate a "normal," healthy diet. The high sugar, low fat group showed signs of liver fat accumulation, "a very dangerous situation, because the liver accumulating more fat mimics the effect of non-alcoholic fatty liver disease.""What's really troubling in our findings is that the rats consuming high-sugar, low-fat diets didn't consume significantly more calories than the rats fed a balanced diet," Czaja said. "Our research shows that in rats fed a low-fat, high-sugar diet, the efficiency of generating body fat is more than twice as high -- in other words, rats consuming low-fat high-sugar diets need less than half the number of calories to generate the same amount of body fat."The groups of rats that ate high sugar diets also developed chronic inflammation in their intestinal tracts and brains, which can disrupt signals sent to the body that indicate fullness, according to former studies.