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Left untreated, a vitamin B-12 deficiency can lead to anemia, fatigue, muscle weakness, intestinal problems, nerve damage and mood disturbances. The recommended daily amount of vitamin B-12 for adults is 2.4 micrograms (mcg). Most people can get enough vitamin B-12 in the foods they eat.
Vitamin B-12 plays a role in red blood cell formation, cell metabolism, nerve function and bone health. A deficiency of vitamin B-12 can be associated with tingling or prickly feelings in legs or hands, difficulty walking, forgetfulness, changes in personality, weakness and anemia (shortage of red blood cells).
Learn about the side effects of Vitamin B12 (cyanocobalamin), from common to rare, for consumers and healthcare professionals.
Cyanocobalamin injection is used to treat or prevent vitamin B12 deficiency caused by the following conditions: Addisonian (pernicious) anemia; Stomach or bowel problems; Worm infestation; Pancreas or bowel cancer; Folic acid deficiency. This medicine is to be given only by or under the direct supervision of your doctor.
If vitamin B12 deficiency is left untreated, it can cause lasting side effects that affect the nervous system and brain. More severe side effects of vitamin B12 deficiency include: Peripheral neuropathy. Degeneration of the spinal cord. Paralysis. Bowel incontinence and/or urinary incontinence. Erectile dysfunction. Depression. Paranoia and ...
Vitamin B-12 can cause very rare but serious allergic reactions (anaphylaxis). This includes swelling of the face, tongue, and throat, and difficulty swallowing and breathing....
Vitamin B-12 — It's estimated that up to 15 percent of older adults are deficient in vitamin B-12. Since vitamin B-12 has not been shown to cause harm, even in large doses, it may be beneficial for older adults to take a B-12 supplement containing at least 2.4 mcg — the Recommended Dietary Allowance — to help prevent deficiency.
Vitamin deficiency anemia is a lack of healthy red blood cells caused by lower than usual amounts of vitamin B-12 and folate. This can happen if you don't eat enough foods containing vitamin B-12 and folate, or if your body has trouble absorbing or processing these vitamins.
Usually a high B12 level is from a supplement. But it’s also not usually considered dangerous because your body eventually dumps the excess B12 (that said, you can have toxicity from other B vitamins, just not B12). Do you have symptoms you and your doctor are concerned about? Someone mentioned Liquid IV (the electrolyte supplement).
In clinical practice, many cases of B 12 deficiency are overlooked or sometimes even misdiagnosed because of misconceptions and misbeliefs among health care professionals. We have summarized the most frequently encountered misconceptions and misbeliefs regarding vitamin B 12 deficiency in Table 1.