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Malabsorption: Cells in the stomach known as parietal cells create an intrinsic factor protein essential for B12 absorption
see the Ipamorelin individual PDP for the Ipamorelin Scientific Journal Author citation
A serum B12 test (and ideally methylmalonic acid or homocysteine if your B12 is borderline) gives you a real answer rather than a guess
Muttenthaler, M., King, G
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