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Cellphones may protect brain from Alzheimer’s

Cellphones may protect brain from Alzheimer’s

A study in mice suggests using cellphones may help prevent some of the brain-wasting effects of Alzheimer’s disease, U.S. researchers said on Wednesday.

After long-term exposure to electromagnetic waves such as those used in cell phones, mice genetically altered to develop Alzheimer’s performed as well on memory and thinking skill tests as healthy mice, the researchers wrote in the Journal of Alzheimer’s Disease.

The results were a major surprise and open the possibility of developing a noninvasive, drug-free treatment for Alzheimer’s, said lead author Gary Arendash of the University of South Florida.

He said he had expected cell phone exposure to increase the effects of dementia.

“Quite to the contrary, those mice were protected if the cell phone exposure was stared in early adulthood. Or if the cellphone exposure was started after they were already memory- impaired, it reversed that impairment,” Arendash said in a telephone interview.

Arendash’s team exposed the mice to electromagnetic waves equivalent to those emitted by a cellphone pressed against a human head for two hours daily over seven to nine months.

At the end of that time, they found cellphone exposure erased a build-up of beta amyloid, a protein that serves as a hallmark of Alzheimer’s disease.

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Calorie postings trim Starbucks calorie consumption

Calorie postings trim Starbucks calorie consumption

A New York City law requiring restaurants to post the calories of their menu items led Starbucks customers to consume 6 percent fewer calories per transaction, a Stanford University study found.

For people who averaged more than 250 calories per purchase, calorie consumption fell by a more dramatic 26 percent, the study said.

Calories per transaction fell on average to 232 from 247, the study found. The impact was almost entirely on food choices, not beverages, said the authors, who persuaded Starbucks to provide them with sales data enabling them to observe every transaction from January 2008 to February 2009.

“There is no impact on Starbucks profit on average, and for the subset of stores located close to their competitor Dunkin’ Donuts, the effect of calorie posting is actually to increase Starbucks revenue,” said the study dated January 2010.

With U.S. obesity rates on the rise, New York required chain restaurants to post calorie counts in 2008. Several other states have followed and there is legislation before the U.S. Congress, said the study by researchers Bryan Bollinger, Phillip Leslie and Alan Sorensen.

U.S. obesity rates rose to 26.6 percent in 2008 from 15.9 percent in 1995, according to a 2009 study by the Centers for Disease Control and Prevention.

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Drinking shows little effect on stroke outcome

Drinking shows little effect on stroke outcome

While some research has suggested that moderate drinking may lower a person’s odds of suffering a stroke, a new study finds that it may have little long-term impact on stroke risk or stroke severity.

The findings, reported in the journal Stroke, come from a more than two-decade follow-up of nearly 22,000 U.S. male doctors. Researchers found that overall, there was no strong association between the men’s drinking habits and their odds of suffering a stroke.

Nor was there a clear connection between alcohol intake and the severity of disability following a stroke.

Some past studies, though not all, have suggested that light-to-moderate drinking may be protective against stroke — as it appears to be against heart disease. But the current study, which followed participants for an average of 22 years, was longer term than those earlier studies, the researchers point out.

In addition, a number of other studies have found that the protective effect of moderate drinking is generally weak and fades with longer-term follow-up, noted senior researcher Dr. Tobias Kurth, of the French national health institute INSERM, in Paris, and Brigham and Women’s Hospital in Boston.

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