It involves four separate steps, and each step depends on the one before it
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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
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DR ROSSI: I have an Oura ring
So if you are getting injections and not getting improvement why are the b12 shots not working