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When your body doesn't have enough, you begin to feel tired and weak
However, some people cannot take vitamin B12 injections safely, including those with Lebers disease or similar eye concerns, kidney disease, liver disease, iron or folic acid deficiency, an active infection, or those taking medications that may interact with vitamin B12
Who Should Avoid It Not for those with personal/family history of thyroid cancer (MTC), MEN2 syndrome, active pancreatitis, or severe gastroparesis
methylmalonyl CoA mutase converts methylmalonyl CoA to succinyl CoA, with 5-deoxy adenosyl cobalamin required as a cofactor
Pernicious anemia results from a lack of intrinsic factor, a protein necessary for B-12 absorption in the gut
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