I've suspected that food might have more affect on people in general than general opinion says it does. But I act really differently on my diet vs. when eating what most Americans eat (I haven't tried eating normally since childhood because the effects are too unpleasant, but I've made enough mistakes in a row to come close on one occasion - see my comment to James_Miller), and most other people act more like me on a good diet than me on a bad diet.

I've considered generalizing from one example when it comes to people who do act similar to me with a bad diet. I tend to keep quiet about it because it comes off as really insensitive to tell someone that their depression might be caused by the candy they eat, when I don't have any evidence for that besides generalizing from my own experience.