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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.