Vitamin B-12 is a water-soluble B complex vitamin found naturally in a variety of foods, including meat, fish and dairy products. Not oly does it help patients lose weight but many also experience enhanced energy levels caused by a faster metabolism. Vitamin B12 plays a huge role in making sure that your body’s metabolism is functioning properly and efficiently. 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 fats and proteins in a swifter manner than usual.