While certanily not a broad sweeping cure all and/or prevenative, in some cases “depression” can be caused by a poor diet.
For instance, take the elements magnesium & iodine. Deficiencies in either of these in the body can cause depression.
Magnesium is needed for over 300 biochemical reactions in the body. Many of these relate to ‘brain chemistry’. If someone has a chronic magnesium deficiency things just are not working as they should be.
Iodine, is another element that is a part of many biochemical actions in our bodies, some also related to ‘brain chemistry’. Yet in many parts of the world iodine defiency is a problem. Most of us receive our iodine through consumption of Iodized salt. Yet many of us have dramatically cut our salt consumption. And do we really trust the Salt companies to iodize salt properly in the first place?? Studies have shown that many do not. Also Kosher & Sea Salt contain little to no iodine.
These mineral deficiencies are just two examples of many. So in ’some’ cases, replacing a crappy diet with a proper diet can drastically help with; if not cure depression. Proper use of vitamin & mineral suppliments may also, if the cause of the depression was vitamin and/or mineral deficiencies.
Exercise of some type can also be very benericial.
AGAIN, LET ME SAY: The above is NOT a sweeping cure all or preventative for depression or mental illness. It is but, in most cases; a piece of the puzzle.
In some cases a huge piece, while in others but a tiny piece; of the puzzle.
Of course, as has been stated by many already; there are also medications that can help with depression & other types of mental illness, if indicated.
In my experience finding the right medication that works for a given individual may take a bit of trial & error. The first one tried may be exactly what the individual needs or it may take 2, 3, 4, tries or more. If it does take a few tries, don’t despair…… your healthcare professional will find what works for you.
Also, if you don’t seem to be getting the relief you need from your regular Doctor, strongly consider seeing a Dr. of Psychiatry. They have had specefic training in the use of Psychiatric drugs & understands them much better than many general doctors. He or she will be much more up on what is indicated for depressions or types of mental illness.