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Smoking cigarettes negatively affects over 300 human genes.

It’s not exactly news that smoking cigarettes is bad for you, but this latest danger is a doozy: smoking damages your genome. The largest genetic study of smoking ever has identified over 300 genes that are negatively affected by cigarettes.

 

The study looked at white blood cells from over a thousand people in the hopes of isolating specific genes whose expression was altered by smoking cigarettes. It’s just one of many studies being undertaken as part of the San Antonio Family Heart Study, which has spent years examining health issues in the Texas city’s Mexican American community, but this particular test is probably the most ambitious.

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