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I'm having a dispute with a co-worker. She claims that you can quit smoking and suffer from no permanent damage. She smoked for 14 years and thinks that she will be completely clean within 6 months. I say that's bullshit.
Are there any experts here that can provide me with some supporting information from a reliable unbiased source such as center for disease control, American Heart Assoc.?
Are there any experts here that can provide me with some supporting information from a reliable unbiased source such as center for disease control, American Heart Assoc.?

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yes there is permanent damage, lungs, hart, skin, cancer that could show up years down the road the list goes on. most likely she will gain about 50 pounds, and turn into a fat ass.