contraindications b12 injections CYANOCOBALAMIN INJECTION, USP What You Need to Know
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pmid:2896913CrossRefPubMedWeb of ScienceGoogle Scholar Iqbal N, Azar D, Yun YM, Ghausi O, Ix J, Fitzgerald RL
Do not double up on doses as this can lead to an overdose
Thats because utilization of vitamin B12 (especially from supplements) depends on levels of other metabolic cofactors and acids
It was general to everyone I'm quite new so I don't know how this works
