For 15 yrs brain fog was the one symptom I could not manage significantly. I knew it would get worse if I would "crash" from not eating or eating candy and then nothing for a while; however a diet for reactive hypoglycemia did not resolve the problem.
Brain fog and lots of other symptoms have declined nicely after 1.5 yrs of cutler protocol chelation.
Based on your symptom list, if you've never considered heavy metals, HMs, I think you'd be wise to consider them. I am so grateful that I did. After my doctors said they did not know why I had a bone density problem in my early 40's my bone density improved 8% and is close to normal.