One of the important uses of B-12 is that it aids in the replication of DNA for new cells. This means that B-12 deficiency can lead to the abnormal replication of DNA, and, as a result, new and healthy cells cannot be generated. Consequently, the effects of aging are manifested in the body. The substance is also needed for the production of red blood cells and for iron to work better in the body. There are various symptoms of Vitamin B-12 deficiency. These include overall weakness, fatigue, irritability and mood changes, numbness or tingling in hands or feet, and irritation of the mouth and the tongue. Moreover, the most serious sign of lack of the substance is impaired brain function. Another thing that should be taken into consideration is that dementia caused by lack of B12 can be reversed with supplementation, and only the B complex itself can prevent the condition. In addition, adequate intake of Vitamin B-12 encourages healthy serum homocysteine levels, thereby supporting cardiovascular health. Because Vitamin B-12 is found predominantly in animal products, strict vegetarians are at risk of developing Vitamin B-12 deficiency and may benefit from supplementation.
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