pasteurized milk may not be the best source of vitamin B12 because the pasteurization process deforms the milk proteins that aid in absorption
. Liver is an excellent source of
of vitamin B12 is a complex process. B12 must be cleaved from its protein
carriers by an acidic pH of the stomach. If you take antacids or use any acid-blocking medications, such as Nexium, Prilosec, AcipHex, or Zantac, you will not free vitamin B12 for absorption.