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It affects every cell in the body, but the most visible effect is on the skin
This is verified with available independent lab test results showing HPLC-MS analysis
According to NICE Clinical Knowledge Summaries, once B12 deficiency is adequately treated and symptoms resolve, routine monitoring of serum B12 levels is generally unnecessary, as clinical response is the primary indicator of treatment effectiveness
This helps to reduce symptoms such as tiredness and lack of energy
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