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The absorption is mediated by very specific receptor mediated transport system
Use in Pernicious Anemia A known condition called anemia often requires methylcobalamin injections to address B12 deficiency, which is caused by an autoimmune issue hindering B12 absorption in the body
Insurance for B12 shots varies
PMC 3650358
Understanding Vitamin B12 and the Nervous System Vitamin B12 is a water-soluble vitamin that plays a crucial role in the production of red blood cells, DNA synthesis, and maintaining brain function
Further, cyanocobalamin and hydroxocobalamin are available by prescription in an injectable form to treat pernicious anemia, and cyanocobalamin is available as a prescription nasal spray
