Berklee Online recommends the following scores: 1  PTE Academic: 68. 2  TOEFL: iBT (internet-based): 100; Computer-based: 250; Paper-based: 600. 3  IELTS: 7.5 or higher.
1 Allergy can certainly cause foggy brain. 2  Wheat is a common cause of brain fog. 3  Many religious groups will fast for several days in order to âclear the brainâ. 4  Food allergy usually causes more than one symptom â often several.
Brain fog has many causes and thyroid problems are definitely on the list. Anything that causes a misfire in your neurotransmitters can lead to a feeling of forgetfulness or living in a mental fog. But itâs very important to realize when these symptoms might be indicating that you have a serious health problem.