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Health Watch: January 23

A look at the stories affecting your health.
A news study in the journal Neurology found that people who had higher levels of Omega 3 fatty acids, which are found in fish oils, had larger brain volumes in old age.  They found the difference was equivalent to preserving up to two years of brain health.  A lot of the increased brain matter was in areas that play a key role in memory.

Women who undergo knee and hip replacement surgery, and then take hormone replacement therapy, seem to cut their risk of repeat surgery by 40%.  A number of knee and hip replacement operations need to be repeated within three years.  Experts think hormone replacement therapy helps strengthen the bone surrounding the implant.

There's silver lining to all of this cold weather-spending more time in the cold could help you lose weight.  Researchers in the Netherlands say that when our bodies work to control body temperature, we expend energy.  They found that after six hours a day in the mild cold for ten days, people in the study increased a certain type of fat that generates heat, and burns calories.
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