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Picture a fat slice of chocolate cake, its thick caramel glaze oozing onto a plate. Your brain, right now, is thinking just like a junkie’s, a new study suggests. When volunteers received a dose of a natural hunger-inducing hormone called ghrelin, their brains responded to pictures of food in the same way that addicted people’s brains do to cigarettes or drugs, says Alain Dagher, a neurologist at McGill University in Montreal, Canada, who led the study.
