How Long Can Third-Hand Smoke Last?

Researchers were interested in finding out how long the residual particulates and substances last in people who quit smoking and in their environment. They recruited 90 smokers to participate in the study and tested the verified quitters for third-hand smoke pollutants at baseline, one week, and one, three, and six months after they quit.

The subjects were tested in two ways: their fingers and their urine were checked for metabolites of third-hand smoke. They also tested the dust in their environment. As you might expect, the bodies of the ex-smokers saw a dramatic decline in smoking metabolites . . .

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