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Vitamin B12

 Vitamin B-12 (also known as cobalamin) affects the growth and repair of all cells, particularly nerve cells. It also plays a role in the activation of amino acids during protein formation. In combination with folic acid, it is necessary for the syntheses of DNA and for maintaining the myelin sheath that surrounds nerve cells to speed up nerve impulse transmission. 

 

And if I don't get enough?

Symptoms range from lethargy and forgetfulness, to that "too tired to get out of bed in the morning" feeling. Severe vitamin B12 deficiency can result in impaired nerve function or even permanent nerve damage.

And If I get too much?

No clear toxicity has been reported from daily oral ingestion of up to 100mg. In addition, no benefit has also been linked with taking doses this large.

 

Vitamin B12 is found in the following foods:

  • Beef

  • Eggs

  • Fish

  • Poultry

  • Liver

  • Dairy products

Vitamin B12 supplements may be useful for older adults. With age, many people lose the ability to absorb vitamin B12 efficiently. The extra amount in a supplement may help. Amounts in excess of 100% of the daily value are not needed.