At a scientific meeting I attended, I was listening to a friend explain to me about his difficulty with cloudy thinking. Many people have experienced this phenomenon in which we feel as though gray clouds are swirling around our brain, keeping us from functioning well in our daily lives.
My friend told me that he had taken a blood test for food allergies and discovered that he was sensitive to egg whites. When he excluded eggs from his diet, his mind became crystal clear — almost as if a curtain had been raised.
The gut is intimately connected to the brain by a number of pathways. During my research on immunoexcitotoxicity, I discovered several studies showing that when the gut’s immune cells are activated by, for example, food allergens, the activation caused the microglia cells in the brain to activate as well. This interfered with higher brain functions and caused brain fog. (Click here to read details on how to protect your brain.)
Food intolerance is different from food allergies in that it can be quite subtle, often with no intestinal symptoms at all, and the effect can occur weeks or even months after exposure to the offending foods. Symptoms can also persist for weeks after the offending food is excluded from the diet.
Even though the connection between food intolerance/allergies and brain fog (and other psychological problems) is quite common, most doctors are completely unaware of the link. (Read about learn about conditions that puzzle physicians by reading my report "Mystery Diseases that Baffle Your Doctor.")
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