Factors Behind Post-Diet Weight Gain

The study indicates that the reason for weight regain after a diet is due to a biological mechanism activated by the brain. The body considers the previous weight to be the "new normal," and defends it as an existential risk. When weight is lost, the brain releases hormones that increase appetite for high-calorie foods and slow down calorie burning, in order to avoid a nutritional deficiency and revert to the previous weight. Additionally, the body maintains a "biological memory" of past weight, which leads to its reaccumulation after stopping the diet or obesity treatment. Modern weight-loss medications reduce appetite and increase satiety, but they are not considered a permanent solution; patients' weight may return after stopping treatment. Obesity, in essence, is a complex biological condition in which genetic and environmental factors intertwine.

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