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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
Oral supplements are a fine choice for many people, particularly for maintenance or for otherwise healthy vegans
Vitamin B12 is water-soluble, and excess amounts are generally excreted through urine
Needle Dead Space Dead space within the needle hub and shaft affects the dosage accuracy in B12 injections
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