While scientists have long theorised about an addiction-like quality to certain foods, only recently has the idea been the subject of intense scientific research, writes Laura Beil

While scientists have long theorised about an addiction-like quality to certain foods, only recently has the idea been the subject of intense scientific research, writes Laura Beil

A genetic link that makes people more susceptible to tobacco addiction, causing them to smoke more and have a greater risk of lung cancer, has been identified by scientists.