No ‘clear evidence’ depression is caused by low serotonin levels

A woman showing signs of depression (Picture posed by a model) (PA)

There is no clear evidence that depression is caused by low serotonin levels, researchers have said, as they called into question the widespread use of antidepressants.

The new review of existing studies found that the condition is not likely caused by a chemical imbalance and said people should be made aware of other options for treating depression.