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4,5 Dietary insufficiency, pernicious anemia (i.e., an autoimmune process that reduces available intrinsic factor and subsequent absorption of vitamin B 12 1,2,6,7 ), and long-term use of metformin or acid-suppressing medications have been implicated in B 12 deficiency

Supports energy metabolism, helping your body convert food into usable fuel

Vitamin B12 is essential for several bodily functions, including the production of red blood cells, maintaining nerve health, and supporting energy levels

You must visit a doctor if you have any of the following symptoms: If you have hard, painful nodes that are fixed to the skin and grow rapidly