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Vitamin B12 injections work quickly and efficiently by bypassing the digestive system and delivering the nutrient directly into the bloodstream, making them an excellent choice for those with absorption issues

Nitrous oxide, a commonly used anesthetic, oxidizes and inactivates vitamin B 12 , thus inhibiting both of the vitamin B 12 -dependent enzymes, and can produce many of the clinical features of vitamin B 12 deficiency, such as megaloblastic anemia and neuropathy

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doi: 10.1016/j.bone.2007.06.005