Resistance to extinction of learned flavour preferences

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Australia is one of several countries experiencing an epidemic of obesity that will have major disease consequences for future decades. Obesity results from sustained liking and surplus intake of foods that override the bodily mechanisms that normally keep bodyweight constant. An important element of overeating is the ability of the sensory properties of foods (flavours) to stimulate short-term appetite. There are close parallels between flavour preference learning in rats and humans. Increasing understanding of the factors that influence persistence of preferences in rats will contribute to more effective programs at both a mass and an individual level for preventing overeating.