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Description
B12 isn't a magic bullet

Common injection sites include the abdomen, thigh, or upper arm, and rotating sites each week helps prevent irritation

This autoimmune condition affects the stomach's ability to produce intrinsic factor, so you can't absorb vitamin B12 through your digestive system

PMID 18606874

It alters metabolic thermogenesis and promotes synaptogenesis via hepatocyte growth factor signaling
