

Like half of Fall Out Boy’s discography. “Hum Hallelujah” gets a special mention for literally being about a suicide attempt. Also “Dance In the Dark” by Lady Gaga, “Stomach Vs Heart” and “Humor of the Situation” by Barenaked Ladies (“Angry People” as well), “Slip Slidin Away” by Paul Simon, “When I Come Around” by Green Day…suffice it to say, I enjoy this trope a lot :P
Dementia specifically I don’t know about, but if you don’t eat enough it will affect brain function, since your brain requires energy to, yknow…work. Found a review article about it from a few years ago if you’re interested.