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B12 injections work by delivering a direct and concentrated dose of vitamin B12, typically in the form of hydroxocobalamin, into the bodys tissues, specifically the muscle (intramuscular)

[1] However, whilst acute toxicity is rare, elevated serum B12 levels can occasionally occur and may warrant investigation, particularly when they arise unexpectedly or in the context of certain medical conditions

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In conclusion, this review underscores the importance of considering neuronutrition as a holistic approach to FM treatment, advocating for further research and clinical trials to establish comprehensive dietary guidelines and to optimize management strategies for FM patients