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Pernicious anemia results from a lack of intrinsic factor, a protein necessary for B-12 absorption in the gut
When your body doesn't have enough, you begin to feel tired and weak
When the body takes in insufficient fluid or loses excess amounts of fluid through sweating or illness, the urines concentration increases, and the yellow colour darkens
Who Should Avoid It Not for those with personal/family history of thyroid cancer (MTC), MEN2 syndrome, active pancreatitis, or severe gastroparesis
Adverse effects observed in trials include nausea, vomiting, gallbladder disease, dehydration, and potential pancreatitis
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
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