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Enzyme may play a role in age-related weight gain

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If you're finding you can't seem to keep the weight off as you age even through diet and exercise, there could be something else to blame.

Researchers identified an enzyme that appears to increase its activity in animals as they age. The increase in this enzyme's activity may play a role in the weight gain and fitness decline that come with aging

Because the new study was conducted in mice, researchers don't yet know if blocking this enzyme in humans will have the same effect. But the findings could potentially lead to the development of new weight loss medications that would block this enzyme.

The study was conducted by the National Heart, Lung and Blood Institute.