b12 injections side effects nhs How Long Does It Take Vitamin to Work? What happens if you inject

Warmly, Loraine

That indicated poor red blood cell production, and those that were produced were malformed and had short life spans

A common synthetic form of the vitamin (cyanocobalamin) does not occur in nature, but is used in many pharmaceuticals, supplements and as food additive, due to its stability and lower cost

doi:10.1073/pnas.0707258104

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