In a policy shift, the American Cancer Society (ACS) this week endorsed e-cigarettes as a smoking cessation aid for smokers who won't use FDA-approved methods.

"Some smokers, despite firm clinician advice, will not attempt to quit smoking cigarettes and will not use FDA approved cessation medications," according to a position statement posted on the ACS website. "These individuals should be encouraged to switch to the least harmful form of tobacco product possible; [...]