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Long-Term Use Considerations MIC B12 injections aren't typically meant for lifelong use
[63] There are not enough studies on whether pills are as effective in improving or eliminating symptoms as intramuscular injections
B12 absorption occurs primarily in the terminal ileum via intrinsic factor-mediated uptake, with approximately 1% absorbed through passive diffusion at high doses
What we care about most, though, are interventional studies, where people are randomized to B12 so we can see what happens
What does getting a B12 injection actually feel like
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