which actually also might help :) It depends on the person and the cause of the depression - a lot of felt& diagnosed depressions aren't caused by faulty brain-chemistry, but by other reasons. So, if a person suffers depression caused by other reasons, than eating healthier and exercise more would, in fact, let the one feel better and high'en up self-esteem (placebo kicks in..).

But yes. That should be left for the experts :)