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There are several causes of vitamin B12 deficiency, including poor dietary intake, malabsorption, and pernicious anemia

This simple check is one of the most important safety measures to prevent complications and ensure the vitamin is delivered correctly into the muscle or fatty tissue, not the bloodstream

PRECAUTIONS: Vitamin B12 deficiency that is allowed to progress for longer than 3 months may produce permanent degenerative lesions of the spinal cord

B12 is present in a variety of food sources (mainly animal-based products), where it is bound to protein molecules

Low potassium levels, which can lead to constipation, an irregular heartbeat, leg cramps, numbness or tingling