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Third-hand smoke causes significant DNA damage - new study

A woman is seen smoking in this file photo.

June 21, 2013 12:00:00 AM PDT
According to a new study, it's not second-hand smoke but third-hand smoke we need to worry about.

Third-hand smoke is the residue that clings to surfaces long after the second-hand smoke from a cigarette has cleared out.

Now, researchers say third-hand smoke causes significant genetic damage in human cells.

They also found that chemicals in samples exposed to chronic third-hand smoke exist in higher concentrations and cause more DNA damage, than samples exposed to acute third-hand smoke.

Researchers say the results of the study suggest residue becomes more harmful over time.