how to give yourself a b12 injection in thigh self-inject intramuscular vitamin - Overview How to Self-Inject Vitamin B12
Description
In case of intracellular deficiency of cobalamin, plasma concentrations of methyl malonic acid (MMA) and homocysteine will rise

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J Hepatol (2009) 50(6):111221

Much of the current evidence is preclinical (cell and animal studies), and human data is still limited

The injectable route ensures adequate B12 delivery regardless of gut function