Aging

Black Americans are more likely than whites to develop Alzheimer's. Yet black people studied appeared to have lower levels of a toxic substance associated with the disease, researchers say.

Why develop an exercise habit now? Because 75-year-olds who've been doing it for decades may have the cardiovascular systems of people in their 40s and the muscles of 20-somethings, researchers found.

Two large studies show that age-related memory loss can be slowed significantly when older people promptly address hearing and vision loss.

A study involving 2,000 women age 65 and older found that a commonly used drug for osteoporosis could reduce the risk for broken bones in women at an earlier stage of bone thinning.

Two drugs appear to support immune function of elderly people and may be important for future research into anti-aging treatments.