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Vitamin B12 shots are injections that a doctor may prescribe to treat a vitamin B12 deficiency. They may be useful for those with gastrointestinal issues, older adults, vegans, and vegetarians. A ...

You cannot overdose on vitamin B12 because any excess you simply pee out. If you get b12 shots, you may experience side effects like dizziness, nausea, and fatigue. It is possible to have elevated B12 ...

SAN DIEGO, Oct. 30 -- Preliminary results of a small ongoing study of vitamin B12 injections for children with autism showed no signs of significant benefit, researchers reported here, but they ...