A team of researchers, including one from The University of Western Australia, has found there may be some truth in the slogan: "Coffee: If you're not shaking, you need another cup."

They've identified the genes that determine just how much satisfaction you can get from caffeine. The results could also help to explain why coffee, which is a major dietary source of caffeine and among the most widely consumed beverages in the world, is implicated in a range of health conditions. All I know is we need it, sometimes I need an IV of fresh beans wide open in a good vein. It's my only vice left, I don't do drugs, drink and quit smoking.

Six new regions of DNA (loci) associated with coffee drinking behavior are reported in the study published in Molecular Psychiatry. The findings support the role of caffeine in promoting regular coffee consumption and may point to the molecular mechanisms that underlie why caffeine has different effects on different people.

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