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A standard serum B12 test measures both fractions together, so a total result mostly reflects how much haptocorrin is circulating, and haptocorrin is made by white blood cells
Convenient and Painless Administration Vitamin B12 injections are typically administered weekly and are virtually painless
See Homocysteine and Mild B12 Deficiency in Vegans for more info
Retrieved 15 May 2025
Cyanocobalamin is the most common form
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