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In most cases, a series of treatments is recommendedusually once per week for 4 to 8 weeks, followed by maintenance infusions monthly
Feng H, Stockwell BR
A vitamin B12 deficiency can develop slowly and symptoms may include: Persistent tiredness or low energy Shortness of breath Pale skin Pins and needles Memory or concentration difficulties If left untreated, deficiency can lead to more serious neurological complications
& Marchesini, G
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