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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.