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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

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The horizontal fraction bar was introduced by the Arabs.

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The longest a person has survived after a heart transplant is 24 years.

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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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