Quitting smoking can have an almost immediate, positive effect on your health.
©Shutterstock, 2010 Quitting smoking decreases the risk of cancer and is always a healthy decision.
Exposure of a premalignant cell to a "promoter" (an agent that can change its state) converts the cell to an irreversibly malignant state. Promotion is a slow process, and exposure to the promoter must be sustained for a certain period of time.
This requirement explains why the risk of cancer diminishes rapidly after one quits smoking; both cancer initiators and promoters appear to be contained in tobacco smoke.
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