Save On Twinlabs 1X 30 Dt B-12 Dots 5000 McgVitamin B12, Or Cobalamin, Was Isolated From A Liver Extract In 1948 And Identified As The Nutritional Factor In Liver, Which Prevented Pernicious Anemia, A Deadly Type Of Anemia Characterized By Large, Immature Blood Cells.: (Note: This Product Description Is Informational Only. Always Check The Actual Product Label In Your Possession For The Most Accurate Ingredient Information Before Use. For Any Health Or Dietary Related Matter Always Consult Your Doctor Before Use.)