"Also, maybe people with candida need the whole day to metabolize the toxins candida spits out, and by evening the liver has detoxed those toxins to the point of lessening brain fog?"
That's a really interesting idea. Candida causes problematic levels of acetaldehyde which is similar to what makes us drunk from alcohol consumption.
I hear that molybdenum, B5/pantethene can help the body to break down acetaldehyde.
When I learned this I got Metametrix stool and urine tests. My doctor said I had the lowest candida levels he had ever seen. This was yet another dead end in my 15 year search for answers.
I'm not saying it is not involved for someone else. I had been exposed to lots of lead paint dust in my family's renovation construction business. I was a foggy "lead head" in my 30's even though I had been a good student when I was young. I've had nice gains from reducing the lead and cadmium levels--frequent dose oral chelation.