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[5] Vitamin B 12 is the most chemically complex of all vitamins, [2] [6] [7] and is synthesized exclusively by certain archaea and bacteria
It contributes to the production and activity of white blood cells, which are essential for defending the body against infections and diseases
People who have had allergic reactions to cobalt or cobalamin (the form of B12 in injections) should avoid them
Many people report better energy, improved mood, and clearer focus after their treatment
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