Washington: A new study has found that elderly individuals with low level of vitamin B12 in their blood are at a higher risk of brain shrinkage and losing their cognitive skills. Lead author Christine C. Tangney, PhD, of Rush University Medical Center in Chicago, and her colleagues looked at 121 people age 65 and older living on the south side of Chicago. Their blood was drawn to measure levels of vitamin B12 and B12-related metabolites that can indicate a B12 deficiency. The participants also took tests measuring their memory and other cognitive skills. An average of four-and-a-half years later, MRI scans of the participants’ brains were taken to measure total brain volume and look for other signs of brain damage.Having high levels of four of five markers for vitamin B12 deficiency was associated with having lower scores on the cognitive tests and smaller total brain volume.“Our findings definitely deserve further examination. It’s too early to say whether increasing vitamin B12 levels in older people through diet or supplements could prevent these problems, but it is an interesting question to explore. Findings from a British trial with B vitamin supplementation are also supportive of these outcomes,” said Tangney.
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