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There are more bacteria in your mouth than there are people in the world.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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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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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.