Addiction is defined as a harmful relationship with a substance or behaviour.
It is commonly associated with smoking, alcohol and drugs. But as a condition it’s difficult to understand.
Do we treat it as a neurological disorder? Or is it a personality trait? And how can we best overcome it, when current treatments for addiction have a relapse rate of about 70 percent?
Dr Farrah Jarral travels to the University of Massachusetts to meet a psychiatrist who is using the power of the mind to overcome addiction.