Finnish scientists concluded that the frequent numbers of lifetime intentional weight loss reflect susceptibility to weight gain, rendering dieters prone to future weight gain. Dieting itself may induce a small subsequent weight gain, independent of genetic factors.
And last year, scientists at the Albert Einstein College of Medicine in New York discovered that when starved of food, brain cells actually consume each other. This causes the release of fats, which in turn results in higher levels of a powerful brain chemical that stimulates appetite. All bad news for dieters, as going without food could make them even hungrier.