Hot chocolate may preclude memory decline in older people

17 August 2013, USA (http://www.royalpharmacyrx.com/) :Scientists indicate drinking two cups of hot chocolate a day may keep the brain healthy and preclude memory decline in older people by preserving blood flow in working areas of the brain. The team carried out a research on the effect of cocoa consumption on thinking and memory execution, as well as something called neurovascular coupling, where blood flow in the brain alters in response to local brain activity.

As different areas of the brain need more energy to accomplish their tasks, they also need greater blood flow. This affinity, called neurovascular coupling, may play a significant role in diseases such as Alzheimer's. The team recruited 60 dementia-free older people of average age 73 and asked them to drink two cups of hot cocoa a day for 30 days.

Half the participants drank hot cocoa high in antioxidant flavanol, whereas the other half drank flavanol-poor hot cocoa. The participants were asked not to consume any other products containing chocolate during the study. The team tested the participants' memory and thinking skills before and after using a set of standard tests.

Using ultrasound, they also estimated neurovascular coupling (the blood flow response to brain activity) as the participants completed the mental tests. These participants also meliorated their scores on a working memory speed test. There was no difference between the participants who drank flavanol-rich cocoa and the ones who drank flavanol-poor cocoa.

There is a strong correlation between neurovascular coupling and cognitive function, and both can be mended by regular cocoa consumption in individuals with baseline impairments. Better neurovascular coupling is also linked with greater white matter structural integrity.

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