The antioxidant resveratrol, which is found in red wine and other foods like nuts and soy, is known for its ability to decrease incidence of heart disease and other illnesses, leading some to call it the "elixir of youth." Researchers at the Scripps Research Institute now have an explanation for how it works.

To date, we know of only two things that can reverse the effects of aging: caloric restriction and extensive exercise. But in a recent experiment, researchers applied a new compound to 2-year old mice, causing their muscles to regenerate to 6-month old levels. Incredibly, human trials may start next year.