Many people start socially smoking, and before long, they are hooked.
Every year, the habit kills around six million people a year worldwide, and causes a host of health problems.
In light of this, online clinic HealthExpress.co.uk has created an online tool which shows the grim effects of smoking on the body.
From yellow skin and brittle nails to bowel disease and blocked blood vessels in the legs, the images reveal the ghastly result of an addiction to tobacco...
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