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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.