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段落1

This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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Olive oil is thought to be healthy because it's mostly monounsaturated fat.

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But cold-pressed extra-virgin olive oil may have an extra benefit:

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it appears to be more filling than other fats.

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That's according to research presented at a German symposium on fat.

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Researchers started by feeding 120 volunteers a daily, 18-ounce serving of low-fat yogurt.

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But mixed in the yogurt were either three tablespoons of either extra-virgin olive oil, canola oil, butter, or lard.

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Turns out volunteers in the olive oil group reported feeling more full during the three-month study period.

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And they had larger concentrations of serotonin in their blood, a signal of satiety.

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The researchers say extra-virgin olive oil contains aromatic compounds that block the absorption of glucose from the blood, delaying the recurrence of hunger.

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Indeed, study subjects who ate yogurt with just olive oil extract consumed fewer calories over a three-month period than those who ate plain yogurt.

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And they finished the trial with less body fat too.

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Which leads these researchers to conclude that olive oil extract could be key to creating a better low-fat snack: tastes great, more filling.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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