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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.