Neither form should be used casually
Because the body cannot make B12 on its own, it has to come from food (meat, fish, eggs, dairy) or from supplements
High dose oral cobalamin may be a suitable alternative in selective cases, where intramuscular injections are not tolerated and compliance is not a problem
Whilst the quantities are minuscule and generally harmless, individuals with impaired kidney function may theoretically have reduced capacity to eliminate this cyanide with very high doses over extended periods, though this remains largely theoretical at normal supplemental doses
But theres a lesser-known, clinically-backed supplement thats been quietly making waves in wellness and medical communities alike: Vitamin B12 injections
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