Vitamin B12 has long been known to play an important role in the monitoring and maintaining of body functions. This vitamin is of the water soluble variety, and is crucial for higher brain and nervous system function, and blood formation. It is one of eight B vitamins that are found in the body. DNA formation inside the body's cellular system uses this vitamin as well, and energy production is also increased by it.

1. http://dietfitnessandweightloss101.blogspot.com/2013/10/some-weightloss-advice.html