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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.