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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.