Confused on this front, one of my PCS symptoms that doesn't seem to go away is terrible brain fog after eating (particularly foods high in fat that I thought were good for neurological health: butter, olive oil, coconut oil, etc). Not sure if it is a histamine intolerance. I am not sensitive to normal foods that are high in histamine, I read somewhere that some high fat foods can trigger histamine release. I am at a loss here though because sometimes I get horrible brain fog after eating seemingly normal and enjoyable foods and can't figure out the cause (never had this before TBI). Anyone have any suggestions?