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Absorption rate compares favorably for both injectable methods over oral supplements, though IV infusions hold an edge

People come in expecting better skin and they get that

Some people who need shots include those who have had gastrointestinal surgery if their digestive system cannot absorb vitamin B12 efficiently

However, by the time most people reach the 10mg dose, they typically have access to larger vial sizes like 30mg vials , which provide better value and easier dosing at this level

Others may receive prescription B12 injections

Still, vitamin B12 injections remain the most reliable and efficient method for addressing moderate to severe deficiency