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When administered by injection, nutrients like carnitine are completely absorbed by the body

I recommend: at least 2,000 mcg (g) cyanocobalamin once each week, ideally as a chewable, sublingual, or liquid supplement taken on an empty stomach or at least 50 mcg daily of supplemental cyanocobalamin or a serving of B12-fortified foods three times a day, each containing at least 190 percent of the Daily Value listed on the nutrition facts label Those over 65 years of age should take at least 1,000 mcg (g) cyanocobalamin every day

Therefore, these factors should be taken into consideration and regular monitoring should be performed in these conditions while treating vitamin B12 deficiency with cyanocobalamin

[DOI] [PMC free article] [PubMed] [Google Scholar] 66.Romeo S, Sentinelli F, Cambuli VM, Incani M, Congiu T, Matta V, et al