What is the link between mental health and suicide?

Research suggests that 70 to 90 percent of people who have made a lethal attempt, or died by suicide, were suffering mental health issues – such as protracted depression or anxiety, bi-polarity, psychosis, and/or substance abuse. While the presence of an unmanaged mental health issue is strongly associated with suicide, it is important to note that most people with a mental illness are not at risk of suicide, and that few suicides are wholly the result of a mental illness.