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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.