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Breaks down mechanisms, what we actually know in humans, and where the hype begins
PMC10056213 Subcutaneous injection osmolality, pH, and volume effects on pain and absorption
Certain health conditions If you have a stomach or small intestine condition such as celiac disease or Crohn's disease, you may not be able to absorb enough vitamin B12 from food
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This is the mistake that invalidates everything else
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