Some of the prominent functions played by B-12 are production of DNA at the time of cell division, and forming healthy RBCs (Red Blood Cells). Some of the most significant and positive effects that Vitamin B12 has on the human body are the breaking down of fats and proteins in swiften manner than usual.
The daily requirement of the human body for Vitamin B-12 is about 3 micrograms. B-12 supplements are dosed in hundreds of micrograms, however, much of this is relative because B-12 is water soluble and much is wasted through passing urine. What we take from the market as supplements usually have a very low amount of usable Vitamin B12 in them, and the main reason for that is fermentation.