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Francesca Mangialasche, Weili Xu, Miia Kivipelto, Emanuela Costanzi, Sara Ercolani, AddNeuroMed Consortium, et al. “Tocopherols and tocotrienols plasma levels are associated with cognitive impairment.” Neurobiology of Aging , 20 December 2011.
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People affected by Alzheimer's disease are more likely to have low blood levels of vitamin E, as compared to people with normal cognitive function.
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ANTI-AGING TIP OF THE DAY
Hitch for Health
Researchers from Johns Hopkins Bloomberg School of Public Health (Maryland, USA) analyzed data from more than 9,100 Americans ages 50 years and older, and found that middle-aged and older Americans who were currently married tended to give higher ratings to their health than their never-married counterparts. Married subjects also reported fewer depression symptoms and limits on their mobility.
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It is generally accepted that Alzheimer's disease is largely a result of build-up from beta-amyloid deposits in the brain, which cause cell damage and cell death by oxidative stress. A number of studies have shown that vitamin E, an antioxidant, exerts neuroprotective properties. Francesca Mangialasche, from the Karolinska Institutet (Sweden), and colleagues analyzed data from 168 Alzheimer's patients, 166 people with mild cognitive impairment, and 187 people with normal cognitive function. The team found that people with Alzheimer's and mild cognitive impairment had lower blood levels of total tocopherols, total tocotrienols, and total vitamin E. Specifically, people with both forms of cognitive decline were 85% less likely to have the highest average levels of total tocopherols and total vitamin E. The study subjects with Alzheimer's disease and mild cognitive impairment also displayed higher levels of vitamin E-related damage markers, as compared to the subjects with normal cognitive function. Writing that: "Both [Alzheimer's disease and mild cognitive impairment] were associated with increased vitamin E damage,” the study authors conclude that: "Low plasma tocopherols and tocotrienols levels are associated with increased odds of [mild cognitive impairment] and [Alzheimer's disease].”