i found a nutritional approach best for depression (consulting a doctor trained in orthomolecular medicine - which as I understand it, is a bit of an alternative and controversial branch of medicine within the medical field) but it definitely helped me and pretty much sorted my very severe depression straight away when i started taking the right things
try this website
http://www.biobalance.org.au/patient...-practitioners

or have a look at this website - its WA based, but you may be able to get some info that is useful
http://www.nutritionreviewservice.com.au/