Throughout historical past a many variation of things have been cash. Youngsters and adults usually consume the beneficial amounts of Vitamin B12 by their diets. Nevertheless, older adults are extra inclined to a deficiency as a result of they have problem absorbing vitamin B12 from meals, notes the Nationwide Institutes of Well being. This malabsorption happens in older adults on account of a number of circumstances reminiscent of atrophic gastritis or pernicious anemia. People affected by a vitamin B12 deficiency might suffer from signs like constipation, weight reduction, fatigue, lower appetite, depression, poor memory and constipation.