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Background. Vitamin B12 is an essential water-soluble vitamin that is commonly found in a variety of foods, such as fish, shellfish, meat, eggs, and dairy products. Vitamin B12 is frequently used in combination with other B vitamins in a vitamin B complex formulation.ackground. Vitamin B12 is an essential water-soluble vitamin that is commonly found in a variety of foods, such as fish, shellfish, meat, eggs, and dairy products. Vitamin B12 is frequently used in combination with other B vitamins in a vitamin B complex formulation.
Loading ... Vitamin B12 (Cobalamin), is a water soluble vitamin which has a key role in the normal functioning of the brain, nervous system, and the formulation of blood.It is one of the 8 B vitamins and is involved in the metabolism of every cell in the human body.ince this vitamin is water soluble the body is not capable of storing it for long periods of time. For this reason, we must consistently supply the body with B12 to avoid deficiency and ensure proper physiological function. Vitamin B12 consists of a class of chemically related compounds which all have vitamin activity.