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Pinch the fat, insert at 90 degrees with a short insulin needle, push slowly, hold for 5 seconds, withdraw
The largest concentration is found in offal (liver in particular) and then continues to decrease through lean meat to dairy products
PMC 6826138
While most people get enough B12 through diet, for some vegans and vegetarians, keeping your levels up is challenging, so supplementation is necessary
1,2,6 The resultant abnormal erythropoiesis can trigger other notable abnormal laboratory findings, such as decreased haptoglobin levels, high lactate dehydrogenase levels, and elevated reticulocyte count
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