We examine the evidence that “liking” and “wanting” are involved in weight gain, obesity, and certain forms of disordered eating. Separate neural pathways exist to mediate these processes, and experimental behavioral methods have been developed to distinguish and to measure them separately in humans. A relevant issue in the hedonics of food consumption is the distinction between “liking” and “wanting” components of food reward. In an environment where energy-dense and highly palatable foods are ubiquitous, it seems plausible that the hedonic system of appetite control will play a primary role in eating behavior-undermining homeostatic processes and driving consumption beyond energy requirements.
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