Tag: B12 conversion

According to the National Institutes of Health, the Recommended Dietary Allowance (RDA) of vitamin B12 for adults is 2.4 micrograms (mcg). This precise measurement is often seen on nutrition labels and supplement facts, but how does it translate to the more familiar milligram (mg) unit?

While both are active forms of B12, research indicates that after absorption, ingested methylcobalamin is broken down and the cobalamin is then converted intracellularly into either methylcobalamin or adenosylcobalamin, depending on the body's needs. These two forms of vitamin B12 serve distinct, yet complementary, functions in the body's metabolic processes.