recommended dose vitamin b12 injections Cyanocobalamin (B12) Injection 1000 mcg/mL, Multiple Vial 1 mL, 25/Tray Vitamin b12 Injection | CardioMender,
Description
On the cognitive side, brain fog, slower reaction time, difficulty concentrating, and headaches are common

[2] They may include diarrhea, feeling sick, hot flushes, itchiness, low blood potassium, allergic reactions, and high blood pressure

Because research is limited, side-effect information is not as strong as it is for FDA-approved medications

You can also experience discolouration in your nails and slow hair growth which can impede on your appearance
