Vitamin B12 Benefits

Vitamin B12 is effective for treating a documented deficiency. There are also numerous other alleged benefits, including the treatment of asthma and the prevention of cervical cancer. However, many of these supposed benefits have little or no supporting scientific evidence. There may also be benefits of vitamin B12 for children, as long as they do not take more than the recommended dosage.

What Are the Benefits of Vitamin B12?

Vitamin B12 is clearly beneficial for treating a deficiency and problems related to a deficiency, such as pernicious anemia. However, it is also claimed to provide several other health benefits, such as:
  • Treating the following conditions:
Many of the claimed health benefits of vitamin B12 have little or no supporting scientific evidence, especially for people without a documented deficiency (see Does Vitamin B12 Work?).
Injectable vitamin B12 and vitamin B12 nasal spray (CaloMist™, Nascobal®) are prescription-only medications with proven effectiveness and safety. Tablets, sublingual ("under the tongue") tablets, capsules, and liquids are alternative forms that are available as non-prescription dietary supplements. Lastly, a patch is available, but there is little evidence to suggest that the vitamin can be absorbed through the skin.
Last reviewed by: Kristi Monson, PharmD
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