Inject: Gently pinch the skin
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Deficiency leads to nerve damage (neuropathy), which presents as numbness, tingling, or weakness
History [edit] Descriptions of deficiency effects [edit] Between 1849 and 1887, Thomas Addison described a case of pernicious anemia, William Osler and William Gardner first described a case of neuropathy, Hayem described large red cells in the peripheral blood in this condition, which he called "giant blood corpuscles" (now called macrocytes), Paul Ehrlich identified megaloblasts in the bone marrow, and Ludwig Lichtheim described a case of myelopathy
The shot itself is as close to painless as possible and there is no downtime afterwards.
Safia Pirani MD What is the typical dosage for vitamin B12 injections per day