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Groovanauts.com > Everything Else > Sex / Health / Relationships / Fashion > Sugar can make you dumb, US scientists warn...That's why I like my Twinkies bitter
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Sugar can make you dumb, US scientists warn...That's why I like my Twinkies bitter

Sugar can make you dumb, US scientists warn

Eating too much sugar can eat away at your brainpower, according to US scientists who published a study Tuesday showing how a steady diet of high-fructose corn syrup sapped lab rats' memories.

Researchers at the University of California Los Angeles (UCLA) fed two groups of rats a solution containing high-fructose corn syrup -- a common ingredient in processed foods -- as drinking water for six weeks.

One group of rats was supplemented with brain-boosting omega-3 fatty acids in the form of flaxseed oil and docosahexaenoic acid (DHA), while the other group was not.

Before the sugar drinks began, the rats were enrolled in a five-day training session in a complicated maze. After six weeks on the sweet solution, the rats were then placed back in the maze to see how they fared.

"The DHA-deprived animals were slower, and their brains showed a decline in synaptic activity," said Fernando Gomez-Pinilla, a professor of neurosurgery at the David Geffen School of Medicine at UCLA.

"Their brain cells had trouble signaling each other, disrupting the rats' ability to think clearly and recall the route they'd learned six weeks earlier."

A closer look at the rat brains revealed that those who were not fed DHA supplements had also developed signs of resistance to insulin, a hormone that controls blood sugar and regulates brain function.

"Because insulin can penetrate the blood-brain barrier, the hormone may signal neurons to trigger reactions that disrupt learning and cause memory loss," Gomez-Pinilla said.

In other words, eating too much fructose could interfere with insulin's ability to regulate how cells use and store sugar, which is necessary for processing thoughts and emotions.

"Insulin is important in the body for controlling blood sugar, but it may play a different role in the brain, where insulin appears to disturb memory and learning," Gomez-Pinilla said.

"Our study shows that a high-fructose diet harms the brain as well as the body. This is something new."

High-fructose corn syrup is commonly found in soda, condiments, applesauce, baby food and other processed snacks.

The average American consumes more than 40 pounds (18 kilograms) of high-fructose corn syrup per year, according to the US Department of Agriculture.

While the study did not say what the equivalent might be for a human to consume as much high-fructose corn syrup as the rats did, researchers said it provides some evidence that metabolic syndrome can affect the mind as well as the body.

"Our findings illustrate that what you eat affects how you think," said Gomez-Pinilla.

"Eating a high-fructose diet over the long term alters your brain's ability to learn and remember information. But adding omega-3 fatty acids to your meals can help minimize the damage."

The study appeared in the Journal of Physiology.


http://news.yahoo.com/sugar-dumb-us-scientists-warn-190918006.html



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Considering how much high-fructose corn syrup is in just about everything these days, this study confirms my suspicion that Americans are getting dumber.



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One thing the article doesn't mention is that they studied three groups, one with omega-3 enhanced water, one with just plain water (as a control) and one with HFCS added to their water, and tested them all on how well they remembered a task 6 weeks down the line.

The results were the omega-3 group performed best, followed by the plain water. The sugared water group performed worse than the other two groups showing that the sugar actually DID make them dumber.

It would've been good to compare it with cane and beet sugar (sucrcose) to see if it's the case that generally sugars are bad, or it's something specific to HFCS.

Although they all get metabolized to glucose before they cross the blood brain barrier, so I'm guessing it's just sugar that's the issue, and (much as I loathe the stuff) not specifically HFCS.



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I'm assuming the type of sugar doesn't matter for the reason you mentioned. I just meant that HFCS is in just about everything these days. The only major difference in the sugars is the rate of metabolization, which shouldn't matter in this case.



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