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How B12 Injections Work Unlike oral supplements, intramuscular B12 injections deliver the nutrient directly into the bloodstream, bypassing digestive limitations

Consultant haematologist Dr Priya Sriskandarajah published an article in Pulse Today including a link to a 2-hour CPD training course on key questions on vitamin B12 deficiency: CPD: Key questions on vitamin B12 deficiency

But I will tell you this: when the vendor testing their own products is also the one selling them, that's not verification

For researchers exploring multiple options, understanding these differences helps in designing rational protocols