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The difference here is that B12 analogues are not bioavailable and so wont improve your B12 intake
There are biochemical reasons that suggest an intramuscular (IM) injection delivers hydroxocobalamin to the bloodstream more rapidly and potentially more effectively than the subcutaneous (SC) route
If you have had Leber's disease (or other forms of optic nerve damage), an iron or folic acid deficiency, or low potassium, your doctor may not recommend it
Nasser Nasseri, M.D., is proud to offer vitamin B12 injections as part of our comprehensive wellness services
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