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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The FDA recognizes 118 routes of administration.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.