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I have also read that low levels of potassium can cause cardiac symptoms so I hope GP tests potassium
1,2 Serum vitamin B 12 levels may be artificially elevated in patients with alcoholism, liver disease, or cancer because of decreased hepatic clearance of transport proteins and resultant higher circulating levels of vitamin B 12
B12 supports normal energy metabolism and red blood cell production, so correcting a genuine deficiency can help you feel and perform like yourself again, but shots are not a proven performance enhancer for people who are not deficient
So far, I am looking forward to seeing some results
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