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Lebers disease (hereditary optic nerve atrophy) Polycythemia vera Low potassium levels (hypokalemia) History of blood clots Preparation Details Avoid alcohol when receiving B12 shots
"FDA approved" is misused constantly
While oral substitutes have shown some effectiveness according to studies, their ability to match the efficacy of intramuscular vitamin B12 remains uncertain
The different pathways offer complementary ways to study metabolic processes
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