Smoking Gun For the Young

A cancer study shows that tobacco poses more of a risk the earlier it's used

Kids who smoke like to think that they're immortal--or at least that if they stop in time, their lungs will heal. But a report in last week's Journal of the National Cancer Institute suggests early smoking may trigger changes in DNA that put young smokers at higher risk for cancer even if they later quit. Researchers studying lung-cancer patients found that those with the worst genetic damage were not those who smoked longest but those who started youngest. What's more, the earlier they started, the more severe the damage.

The findings are particularly alarming because they arrived the same week as...

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