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B vitamins come in eight varieties. You may know them by numbers, such as B1, B2, and so on, or by names, such as niacin, thiamin, and folic acid (or folate). However you refer to them, they all add up to support many of the body’s functions, including metabolism, cell growth, and immunity. A new study finds that one of the B’s may affect mental performance.
The B in question is B12. Research in the American Journal of Clinical Nutrition found that low levels of B12 often appear prior to mental decline. Subjects with higher B12 levels had a slower drop-off in cognitive function over 10 years than those with lower levels.
B12 has been shown to reduce levels of a protein called homocysteine, which has been linked to Alzheimer’s disease (and heart disease too). Doubling a person's B12 levels with supplements could slow cognitive decline by one-third, the researchers reported.
Studies are currently underway to see if B12 supplements actually do lower heart disease risk. These studies may also show whether they help slow mental decline as well, the researchers say. Before starting any new medication, including taking vitamin B, be sure to ask your doctor if a supplement of B vitamins is appropriate.
SOURCE: American Journal of Clinical Nutrition, November 2007, National Library of Medicine
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