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Description
Vitamin B12 deficiency and the nervous system: beyond metabolic decompensationcomparing biological models and gaining new insights molecular and cellular mechanisms

In most food sources, B12 is bound to a protein molecule released by the metabolic activity of hydrochloric acid and other enzymes in the stomach

PMID: 41754849

It removes the question of whether enough of the peptide successfully navigated the circulatory system to reach its destination

How quickly will I feel the effects of a B12 shot

With topicals, its all about how much active ingredient is in each drop
