The subject is confusing?
There are three factors in play here which is why this matter is so confusing.
Brain
First there is the brain over which you have limited (regarding foods,toxins) control. Chronic
Depression (it never goes away) that is not related to any event in your life is due to something wrong with the bio chemistry of the brain. Certain chemicals or foods ,good or bad will affect your brain as well as your genetic makeup. However I believe this form of
Depression is mostly genetic.
Spirit
Second there is your mind which you do have a significant amount of control if you learn the "secret of consciousness or Real Meditation".
There are two factors at work here. One is the release of blissful energy through real meditation,(not concentration). The other is to simply not focus on negative events in your past or present and live in the Real True Present Moment. This is the sacrifice of the EGO into LOve-Bliss.
Psychological Self
These are problems of a psychological or traumatic nature. These can be worked on through varying methods. There is that EFT or affirmations therapy. Or there is conventional psychotherapy or just plain time and crying or screaming. Your choice.
But it appears to me that some
Depression is due to genetic brain dysfunction and while it can be improved with nutrition it cannot be cured. See below:
Morrissey on depression:
"there is no one who can tell me anything about it, and there is nobody who can help me."
Rokybird says: After 45 years of depression I know very little about it. I know certain things make it worse;
food allergies ,mercury poisoning,toxic metals, food
additives ,vitamin deficiencies.
A few things may be helpful;exercising but even that can be limited.
Real meditation which is not the candy store version hyped everywhere does not cure it. Even sitting in front of an Enlightened Being doesnt cure it. I know I tried it.
I think it is bio chemical disorder of the happiness center in the brain not a psychological disorder. anti depressants just make one feel numb.
No supplement that I have tried has cured it.