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Common lifestyle factors contributing to deficiency include: High levels of stress or anxiety Strenuous exercise routines without adequate nutrition Frequent travel or irregular meal patterns If youre encountering fatigue, brain fog, or prolonged physical or mental exhaustion, it may be time to check your B12 levels

People who are B12 deficient either dont get enough of the nutrient in their diet, or they have a difficult time absorbing the nutrient

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Bacterial growth without the benzyl alcohol preservative rapidly contaminates the solution and can introduce infection risk

This distinction matters because units, milliliters, milligrams, and medication concentration are different measurements