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​ Brain fog and nutrient deficiencies

​ Brain fog and nutrient deficiencies

12 Jul 2025 by Ted Escobedo   2 min read

Characterized by symptoms like confusion, forgetfulness, and difficulty concentrating, brain fog can be a complex and frustrating issue. What’s more, brain fog can be caused by a wide range of conditions, making it challenging to diagnose and treat
Brain Fog is typically characterized by issues like: difficulty concentrating, forgetfulness, confusion, lack of mental clarity, slow or sluggish thinking, feeling easily distracted, finding it difficult to put your thoughts into words.
In addition to hormone changes, chronic stress, and lack of sleep, many people may wonder whether diet might also affect brain fog. Experts believe several nutrient deficiencies could contribute to brain fog, including vitamin D, vitamin B-12, and iron.
• Vitamin D: Vitamin D plays a key role in several aspects of health, including brain function
Interestingly, some research has found that low levels of vitamin D may also be linked to a higher risk of depression. Depression can cause a range of symptoms, including brain fog and memory problems. If you are deficient in vitamin D, you may be able to correct your levels by taking a supplement, eating more fortified foods, or getting regular sun exposure. That may be beneficial for depression, cognitive decline, and brain fog.
• Vitamin B-12: Vitamin B-12 is an important micronutrient involved in DNA synthesis, red blood cell production, and the function of the central nervous system. A deficiency in this key vitamin can negatively affect brain function, which can cause issues with memory, thinking, and judgement. Fortunately, increasing your intake of vitamin B-12 through food sources or supplements can be beneficial.
• Iron: Though iron may be best known for its role in promoting the formation of healthy red blood cells, it’s also involved in cognitive function and brain. Some research has found that both high and low levels of iron in the blood could disrupt the function of the nervous system, which may lead to alterations in memory, attention, and behavior — all of which are associated with brain fog.
If you believe that a vitamin deficiency is contributing to brain fog symptoms, talk to your physician before you begin to take any additional supplements.

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