b12 injection cycle Shots vs. IV Infusions: What is the difference? How to Give a B12

The correct approach: Test serum B12, MMA, and homocysteine not just serum B12 Use the functional cutoff of 500 pg/mL for optimal status, not the labs lower limit of 200 pg/mL Identify the cause diet, malabsorption, medication, or autoimmune Match the supplementation protocol to the cause and severity Retest to confirm response, and continue monitoring if the underlying cause persists If youre over 50, vegan, taking metformin or PPIs, or experiencing unexplained fatigue, brain fog, or neuropathy get tested

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But even when enough B12 is consumed, deficiency can emerge because of absorption issues

It doesn't appear to affect growth factors like IGF-1, which is a key differentiator from full hGH