‹ NUTRITION WHY’S #31: WHY VITAMIN B12 ? Vitamin B12 is not made by humans, plants, or animals so you need it every day in a Multivitamin or from your shakes and other fortified foods. It is only made by bacteria and must be taken daily in foods or supplements.
NUTRITION WHY’S #31: WHY VITAMIN C ? You need vitamin C, because like guinea pigs, and primates – humans don’t make vitamin C while many other animals including mice and rats do make vitamin C. ›