Vegan vitamin b-12 (fast dissolve lozenges) - 1000 mcg - methylcobalamin vitamin b12 is a water-soluble vitamin that is stored in the liver. It is an especially important vitamin for maintaining healthy nerve cells and, it is of special interest to vegetarians and vegans since it is not found in any significant amounts in plant foods. Many elder people may be unable to efficiently absorb the vitamin b12 found in foods. This is because the stomach's production of acid tends to decrease as we get older. It is this stomach acid that is necessary to break vitamin b12 away from the proteins in food. This process must happen first before vitamin b12 can bind with what is called intrinsic factor in our small intestines before then being absorbed.