Hi, I don't know what doctors have told you. But when I see someone talking about brain fog I go right to grape seed extract. I'm 77 and was told I have Fibro, which I questioned for years, and many with fibro talk about brain fog. I have never had a fog issue. Grape seed ex works on all circulation from head to toes. My grandkids 15 and 19 have been taking this OPC for a couple yrs and I'm going into my 21st yr.

Do a search on brain fog and grape seed extract, you will find many sites about it.

Diet can cause issues, gluten does a job on many we are finding. Meds I'm sure could cause fog. So this is my thinking.