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Did you know?
According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Excessive alcohol use costs the country approximately $235 billion every year.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.