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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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There are 20 feet of blood vessels in each square inch of human skin.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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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.