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IV therapy is a method where substances are administered directly into the vein , providing immediate access to the bloodstream

Cyanocobalamin is a common but synthetic B12 that is often added to foods, and the body must use precious energy to convert this form into methylcobalamin

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Intrinsic Factor Inhibiting Conditions Conditions such as autoimmune disease or pernicious anemia cause an inability to make the intrinsic factor that is essential for Vitamin B-12 absorption

(2011) Protein kinase C-mediated phosphorylation of the -opioid receptor and its effects on receptor signaling