Today's Top Medical Stories for Thursday, July 31, 2014

By CBS News

Published 07/31 2014 08:46AM

Updated 07/31 2014 08:48AM

A scientific review of the latest evidence suggests the benefits of e-cigarettes outweigh the risks. An international team of leading tobacco researchers says the battery-operated devices are much less likely to be harmful to users or bystanders than conventional cigarettes. E-cigarettes allow users to inhale vaporized nicotine. But researchers acknowledge the long-term health effects of e-cigarettes are still unknown.

New research suggests signs of depression could predict the onset of dementia. Previous studies have shown a link between the two conditions, but it wasn't clear how they were related. Researchers in Chicago found patients who had more severe symptoms of depression experienced a more rapid decline in their thinking and memory skills. 

And tree nuts may help protect against diabetes. Researchers in Canada found eating two servings a day of tree nuts - such as almonds and cashews -- helped people with type two diabetes lower and stabilize their blood sugar levels. The best results were seen when tree nuts replaced refined carbohydrates rather than saturated fats.

(Marlie Hall, CBS News)

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