[footfootfoot]

Having suffered through depression when I was eating a very healthy diet, getting plenty of exercise, meditating, and living a pretty wholesome life, and then at times when the pendulum has swung the other way and I was not taking care of myself, eating like crap, and staying up until all hours I was very productive and motivated.

In my case, it seems capricious when it strikes, just like my hayfever. Some years it's bad and other years I don't have it. Over 40 hayfever seasons I've never seen any change in symptoms that was repeatable.

I think depression can be caused by many factors simultaneously, and in any case exercising, eating well, and having a healthy lifestyle certainly can't be bad for you, they just might not be the panacea that we'd all hoped.