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Common examples include fatigue or low energy with normal blood results, brain fog or reduced concentration without confirmed vitamin B12 deficiency, stress-related exhaustion or burnout, increased metabolic demand such as during illness recovery, high workload, or intense training, restrictive or inconsistent dietary intake, or suspected poor oral absorption despite normal serum levels
For people with an MTHFR mutation, methylcobalamin (as opposed to other forms of B12) is therapeutic
Weeks 1 through 4 The first month is primarily about titration and adjustment
Hopefully things will get better.
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