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Description
Do not take Vitamin B12 Injection if you: Are allergic to Vitamin B12, cobalt, or any other ingredients in the tablets Have hereditary optic atrophy (loss of some or most of the nerve fibers in the optic nerve) Vitamin B12 Tablets should not be used in newborns

Vitamin B12 Vitamin B12 is an essential nutrient the body needs to function properly

As well, some prescription heartburn medications can block B12 absorption
The CDC currently recommends that people age 5 and older get an updated booster at least 2 months after their last dose

Many people turn to vitamin B12 injections to address deficiencies, but an important question remains: how long does B12 stay in the body after an injection, and how long do its benefits last