The four typical forms of B12 in supplements are: cyanocobalamin, methylcobalamin, adenosylcobalamin, and hydroxocobalamin
The type of B12 and the way its administered can influence how your body uses it
Vitamin B12, which appears in foods like meat, dairy, eggs and more, helps your body to: Convert food into fuel Make red blood cells Support brain and nerve function Regulate mood and focus Its also critical for maintaining a healthy metabolism and energy levels
In cases of severe deficiency or pernicious anemia, injections may be given daily or weekly initially, followed by maintenance doses every month
Some individuals report developing acne after starting B12 supplements or injections, raising questions about this potential side effect