“Methylcobalamin, an active form of vitamin B12, is the most bioavailable and therapeutically effective form. Unlike cyanocobalamin, which requires biotransformation, methylcobalamin is readily ...

According to the NIH, people aged 14 years and over require 2.4 mcg of vitamin B12 daily. People who are pregnant require up to 2.6 mcg, while those who are nursing require up to 2.8 mcg.