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where to give b12 injection Safe Guide at Home B12 Shots at Home: How,
Description
Also, patients should be warned about the danger of taking folic acid in place of vitamin B12, because the former may prevent anemia but allow progression of subacute combined degeneration

Side effects like nausea, vomiting, and gastrointestinal discomfort are common
Side effects are rare and typically mild
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Expired vitamins will not become poisonous, but rather lose their potency
