Once during a lecture, Alfred Korzybski offered his students some cookies, which they seemed to enjoy, then he showed them a label on the bag, “dog cookies,” and some of them felt sick. "I have just demonstrated that people don't just eat food, but also words, and that the taste of the former is often outdone by the taste of the latter." Hypnotists have often demonstrated that words can have physiological effects.
If I've learned one thing from all this nutrition talk and experimenting, it's that having the right mental state (mood, concentration, ...) has the biggest effect on my 'health' (= life quality). While food can help my mood and brain function, do you think a stimulating environment ('having fun') is more important than eating 'right'?