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Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Cyanide works by making the human body unable to use oxygen.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Vaccines prevent between 2.5 and 4 million deaths every year.