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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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).
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.