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Valine: An essential BCAA vital for muscle repair
People with pernicious anemia often take 1000 to 2000 mcg of oral vitamin B12 daily
[14] The injection is generally well tolerated
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However, some patients receiving high-dose B12 supplementation or injections may experience adverse reactions, though these relate to the treatment rather than the elevated levels: Possible reactions to B12 supplementation (particularly injections): Skin reactions, including acneiform eruptions or rashes Pruritus (itching) Injection site reactions (with parenteral administration) Rare hypersensitivity reactions Non-specific symptoms such as headaches, dizziness, or gastrointestinal disturbances have been reported by some patients taking B12 supplements, but causality is not well established in clinical evidence
research shows no additional benefit above 1 mg daily Important: Doses above 1 mg (1,000 mcg) daily showed no additional metabolic benefits in clinical research
