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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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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.