Vitamin B12 is an essential nutrient involved in energy production, red blood cell formation, nervous system health, and the metabolism of every cell in the body
People with ME/CFS may be at risk of vitamin B12 deficiency if they have a diet that is low in vitamin B12-containing foods especially meat, dairy and fish
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(More information) Vitamin B 12 deficiency is commonly associated with chronic stomach inflammation, which may contribute to an autoimmune vitamin B 12 malabsorption syndrome called pernicious anemia and to a food-bound vitamin B 12 malabsorption syndrome
Theoretically, this supports the production of lipoproteins that transport fats from the liver, potentially reducing hepatic fat accumulation
Women with low vitamin B12 levels may experience tiredness, weakness, or reduced concentration