Proc Natl Acad Sci USA 111 , 76067611 (2014)
If there is a lack of cobalamin in the body, methylmalonyl CoA accumulates, which presumably leads to the neurological manifestations of B12 deficiency.[4][7][9][12] The replenishment with parenteral cyanocobalamin causes a rapid and complete improvement of megaloblastic anemia and gastrointestinal symptoms caused by vitamin B12 deficiency
By suppressing tyrosinase activity, it shifts melanin production from eumelanin (dark, brown pigment) toward phaeomelanin (lighter pigment), progressively reducing skin darkness and evening out tone across treatment cycles
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[DOI] [PMC free article] [PubMed] [Google Scholar] 152.Fang H, Rodrigues E-Lacerda R, Barra NG, Kukje Zada D, Robin N, Mehra A, Schertzer JD