is a b12 injection im How to Give Injection: Step-By-Step Instructions B12 Shots at Home: How,
Description
Treatment of Vitamin B12 Deficiency Thirty mcg daily for 5 to 10 days followed by 100 to 200 mcg monthly injected intramuscularly

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Your GP will investigate other common causes of elevated B12, including myeloproliferative disorders, excessive supplementation, renal failure, and certain cancers, whilst assessing whether your liver disease has progressed to a stage causing cellular damage