It permanently damages your lungs, drastically raises your risk of cancer and can cost you thousands of pounds over the course of your life.
But regardless of the obvious downsides, millions of us still smoke. In fact, nearly 7million Britons and 31million Americans are hooked on cigarettes.
Although rates have plunged over the past few decades, experts are desperate to convince even more people to give up the deadly habit for good.
With Stoptober now in full swing, MailOnline spoke