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On average, the stomach produces 2 L of hydrochloric acid per day.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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There are 20 feet of blood vessels in each square inch of human skin.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.