b12 injections before chemo Vitamin Deficiency: Causes, Symptoms, and Treatment B12 Injections | Energy &

[30] For example, cyanocobalamin can be converted to its analog cobalamins via reduction to B 12s , followed by the addition of the corresponding alkyl halides, acyl halides, alkene or alkyne

Low B12 levels can lead to megaloblastic anemia, a condition where red blood cells are abnormally large and unable to transport oxygen efficiently, causing symptoms like fatigue, weakness, and breathlessness

If you feel tired and cranky, you may have vitamin deficiencies

In addition, efflux transporters such as P -glycoprotein ( P -gp) and breast cancer resistance protein (BCRP) actively remove many therapeutic agents from the brain (Kadry et al., 2020)