what is the difference between b12 injections and b12 tablets Vitamin vs. Oral Supplements: Which Do You Actually Need? Vitamin B12 Injections: Benefits and
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Neither is universally more potent

B12 is a cofactor in metabolic pathways that convert food into usable energy (ATP), which has led to the misconception that it acts as a stimulant

doi: 10.1093/qjmed/hct051 Note: Originally published in February 2015, this article has been revised and updated for accuracy and thoroughness.

These impurities may cause irritation or reduce effectiveness

Parenteral hydroxocobalamin dose intensification in five patients with different types of early onset intracellular cobalamin defects: clinical and biochemical responses
