It plays a central role in mitochondrial energy metabolism as an electron carrier in the respiratory chain (complexes I and III)
Before taking this medicine You should not use Vitamin B12 if you are allergic to cyanocobalamin or cobalt, or if you have Leber's disease (an inherited form of vision loss)
Public Health England, 2013)
Song K, Zhou L, Wang C, Yuan Z, Cao Q, Wu X, et al
(FDA oversight is basically an established safety standard regarding how a product is manufactured in a compounding pharmacy facility, less so about its performance or safety.) A reversal would not automatically open the floodgates, but it would be a significant change, notes Hajduczok