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Do not confuse tiny air bubbles (which are normal after drawing from the vial) with particles
Its chosen because it effectively fixes vitamin B12 deficiency in most adults
When you swallow a B12 pill, several steps have to work for it to be absorbed: stomach acid and the enzyme pepsin must release B12 from food or the supplement, the stomach must secrete a protein called intrinsic factor that binds to B12, and the B12-intrinsic factor complex must reach the ileum (the end of the small intestine) where it is finally absorbed
HPLC results and mass spectrometry results measure different things
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