Depression is a mental illness that affects 1 in 3 people in their lifetime. This is the most prevalent mental illness and can affect anyone, regardless of age, gender, ethnicity or background.
The causes of depression are often unknown; however theorists have put one of the likely causes of depression down to chemical imbalances in the brain. These chemicals are neurotransmitters called Serotonin, Dopamine and Noradrenaline. Particularly low or high levels of these chemicals can change the mood of a person. Most researchers believe the cause of depression to be a combination of many risk factors which influence mood, yet this is not always the case.
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