crave.jpgIndividual brain chemistry and genes could be the key to understanding why some people become addicted to nicotine, University of Colorado at Boulder researchers say.

The depth of a person’s addiction to nicotine appears to depend on his or her unique internal chemistry and genetic make-up,  said lead author Jerry Stitzel, an assistant professor in CU-Boulder’s department of integrative physiology and researcher with CU-Boulder’s Institute for Behavioral Genetics.

It’s also why the chemical compound’s effects appear to diminish at night, said Stitzel, who presented his team’s findings in San Diego last week during the Neuroscience 2007, an annual scientific meeting.

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