Vitamin B12 (cobalamin) Vitamin B12 is a water-soluble and an essential vitamin and use in every cell of the human body. Vegetarians are particularly prone to Vitamin B12 deficiency. The average healthy human adult has a total of 3,000 – 5,000 micrograms of Vitamin B12stored in their Liver. Approximately 39% of adults aged 26 to 83 years of age have plasma Vitamin…