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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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There are 60,000 miles of blood vessels in every adult human.
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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 first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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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.