before you give a b12 injection questionaire Shots at Home: How, Where & How Often to Inject Yourself 3 monthly injections : r/B12_Deficiency

Once absorbed, vitamin B 12 binds to transcobalamin II and is transported throughout the body

The choice between these forms can be important, which is why consulting with a professional is so helpful for creating a plan that aligns with your wellness goals

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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