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The body's capacity to absorb B12 from food is naturally limited by intrinsic factor, a protein produced in the stomach that binds to B12 and facilitates its absorption in the small intestine
Transcobalamin carries the smaller remaining share, and that is the fraction cells can absorb and use
Oral vitamins and electrolyte drinks are typically absorbed at 20% to 50%, according to research published by the National Institutes of Health
The ideal schedule depends on a few key things: how well your body absorbs and uses B12, any underlying health conditions you might have, and even your daily habits
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