What Are the Causes of Brain Fog?

Many of us are all too familiar with brain fog. It feels as though your brain is in the midst of thick fog. You can't think clearly, you aren't processing information as you should, and you may not be able to come up with an appropriate response to a question.


Brain fog can cause you to become detached from what is going on around you and may even lead to forgetfulness and depression, according to Dr. Lawrence Wilson of drlwilson.com. Brain fog can be caused by many factors. Menopausal women may rightfully blame it on an imbalance of hormones. Too much, or not enough, oestrogen can impact your brain. Dr. Wilson notes that other influences, emotional, physical, biochemical and even spiritual, can result in brain fog.

Toxic Chemicals

Exposure to toxic chemicals can lead to brain fog. Copper is associated with disorientation, racing thoughts, mood swings and confusion. Right before a woman's menstrual period, her copper level rises and this may account, in part, for PMS. Aluminium, lead, cadmium and mercury can lead to brain fog if you are overly exposed. Mercury toxicity comes from eating certain fish, such as tuna, and can also occur as a result of dental amalgams. Aluminium is found in cosmetics, antacids, table salt, antiperspirants and sometimes in water.

Calcium Levels

Calcium levels that are too high can result in brain fog and even in a sense of losing touch with reality, including mental fatigue, depression, a sense of heaviness and diminished awareness. This pattern of behaviour is called calcium shell. It can be corrected by eating properly. Too much manganese, chromium and iron can also lead to brain fog.

Chemo Brain

When people undergo chemotherapy, some experience what is called chemo brain, according to the Mayo Clinic. It is also referred to as chemo fog or cognitive dysfunction. The symptoms include difficulty concentrating or finding the right word to use, fatigue, mental fogginess and difficulty with visual and verbal memory.


If you are having problems with brain fog, examine your diet. According to Avianweb.com, the brain does best when starchy and sugary foods are avoided. The brain needs approximately 25 grams of glucose circulating in the blood stream to work optimally. One banana will do the trick. The brain needs good fats but not trans fats. Good fats are omega-3s, which have proved beneficial in treating schizophrenia and in the brain development of infants. Make sure that you eat adequate amounts of protein. Vegetarians may be at risk for brain fog due to dietary deficiencies.

Brain fog can also be provoked by lack of sleep and by stress. Exercise will help an individual deal with stress and will help clear up a foggy brain.