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Description
[3] The speed of response depends on multiple factors including the severity and duration of deficiency, the presence of neurological complications, and individual metabolic differences

Both of these effects mean you eat less food

One way to find out is to get a comprehensive blood test done

Testing your B12 levels provides our medical professionals with a clear, data-driven baseline of your overall health: Identifying Deficiencies: Blood tests reveal the exact severity of your B12 deficiency
