My mom was in a good mood, gave her rice and little pieces of chicken, she started to mmm and say she feels like nerveous, anxious like running from bed. She can't get up and is a bed.
I have noticed that the quantity of solid food taken does seem to affect the brain...much more anxious, and mean, after a bigger meal. Also caffeine is a huge mind-alterer. Is it blood sugar, or a cardiac issue? Don't know, but it does happen to us...almost an anger that she has to digest the food.
My husband's mood could vary a lot during the day, but I never noticed a connection to what he was eating.