I will say this: though altering your food intake obviously won't magically obliterate mental illness, anything you put into your body will usually affect the way your body and brain operate in some way. That includes food, drugs, whatever. I do personally notice subtle differences when I eat differently
Idk I guess I'm just saying that some of the advice given by well-meaning but oblivious folks may sometimes hold a bit of truth. It's never as simple as, "Just meditate! Eat a fuckin vegetable!! Go for a walk!" Obviously there is not one immediate blanket cure, that's ridiculous. However, practicing some of these things when you're able, have the potential to make chronic conditions and symptoms more manageable.
There is some truth to making small changes in your intake and activity, paying attention to what triggers certain feelings, thoughts, sensations, and figuring out what works for you. It's a slow and exhausting process, but it can help over time.
I would like to add on to this, because I worry I may be coming across as dismissive here. I absolutely did not mean to invalidate anybody here, I 100% understand the frustration with certain platitudes spouted by people who don't understand the complexity of mental illness, and truly believe that something so simple and straightforward will cure you. I think many of these people mean well, and i think many of them are only trying to make themselves feel good. I also have experienced being dismissed and shut down by family members in denial, who refused to try to understand.
I'm only saying that incorporating certain habits can make things a little bit easier for some people. Personally, I have not been responsive to psychiatric treatment, nor counseling. My first and last thoughts of the day used to be, "I just want to fucking die." I know what it's like to be in constant agony, and to feel like you are in a spiral that you cannot win against.
Recently, I have found certain things to be helpful in reducing the level of suffering, and that does include better eating habits. I can physically and mentally feel the difference between a day which I don't eat/eat like shit, and one where I eat decently. Just small little things, largely centering around mindfulness, that add up into a slightly better quality of life.
Idk, I just wanted to clarify that I'm not shooting anyone down, nor am I necessarily siding with people who give this sort of advice.