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Injectable use should only be handled by qualified medical professionals in a clinical setting
For vitamin B12 pills, most people take these daily in doses recommended by their doc but taking 1,000 mcg daily is pretty standard
B12 (hydroxocobalamin is listed as an essential medicine by WHO (see page 19 here) but it seems this is not understood by many GPs
The decline in cognitive function may involve HHcy-induced dysfunction of the bloodbrain barrier (Tawfik et al
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