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''It's been established the some individuals may be predisposed to addiction,'' Blau added. ''These findings suggest that a specific genetic make-up in humans could further explain why some individuals are more susceptible than others.''
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This article talks about research about using fruit flies with mutated genes to test the reaction to crack cocaine specifically but with implications to all addictions.
I still think a lot of addiction is social/psychological, at least at it's inception, but further cracking of the gene code may show why some people are hopelessly trapped by addiction.
Of course not all addictions are a bad thing.....like being addicted to the Cellar.
