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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
High doses help reduce nervousness
Safia Pirani, MD, consider the patients symptoms, medical history, blood test results, severity and cause of deficiency, absorption concerns, current medications, and response to previous supplementation
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