Concerned about B-12? You have good reason to be. A serious shortage of B-12 in the body can cause tingling and numbness in the extremities, and in some cases permanent dementia. According to a
recent article in Health magazine, adults between the ages of 20 and 50 are just as likely to have lower levels of B-12 as seniors. 

In addition, new studies indicate that some sources of B-12 are better than others. The article also cites a recent study, conducted by Katherine Tucker, a nutritional epidemiologist at Tufts University , that suggests patients who got their B-12 from meat, fish, and poultry--all high in B-12--had lower levels of the vitamin in their blood than did people who got their B-12 from dairy products like milk or yogurt. The article suggests that dairy products, fortified cereals, and vitamin supplements are the best sources for B-12.

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